diff --git a/packages/accounts-base/accounts_server.js b/packages/accounts-base/accounts_server.js
index 13ac0c3ea8..b185288fe3 100644
--- a/packages/accounts-base/accounts_server.js
+++ b/packages/accounts-base/accounts_server.js
@@ -569,62 +569,6 @@ export class AccountsServer extends AccountsCommon {
       this.setUserId(null);
     };
 
-    // Delete all the current user's tokens and close all open connections logged
-    // in as this user. Returns a fresh new login token that this client can
-    // use. Tests set Accounts._noConnectionCloseDelayForTest to delete tokens
-    // immediately instead of using a delay.
-    //
-    // XXX COMPAT WITH 0.7.2
-    // This single `logoutOtherClients` method has been replaced with two
-    // methods, one that you call to get a new token, and another that you
-    // call to remove all tokens except your own. The new design allows
-    // clients to know when other clients have actually been logged
-    // out. (The `logoutOtherClients` method guarantees the caller that
-    // the other clients will be logged out at some point, but makes no
-    // guarantees about when.) This method is left in for backwards
-    // compatibility, especially since application code might be calling
-    // this method directly.
-    //
-    // @returns {Object} Object with token and tokenExpires keys.
-    methods.logoutOtherClients = function () {
-      const user = accounts.users.findOne(this.userId, {
-        fields: {
-          "services.resume.loginTokens": true
-        }
-      });
-      if (user) {
-        // Save the current tokens in the database to be deleted in
-        // CONNECTION_CLOSE_DELAY_MS ms. This gives other connections in the
-        // caller's browser time to find the fresh token in localStorage. We save
-        // the tokens in the database in case we crash before actually deleting
-        // them.
-        const tokens = user.services.resume.loginTokens;
-        const newToken = accounts._generateStampedLoginToken();
-        accounts.users.update(this.userId, {
-          $set: {
-            "services.resume.loginTokensToDelete": tokens,
-            "services.resume.haveLoginTokensToDelete": true
-          },
-          $push: { "services.resume.loginTokens": accounts._hashStampedToken(newToken) }
-        });
-        Meteor.setTimeout(() => {
-          // The observe on Meteor.users will take care of closing the connections
-          // associated with `tokens`.
-          accounts._deleteSavedTokensForUser(this.userId, tokens);
-        }, accounts._noConnectionCloseDelayForTest ? 0 :
-          CONNECTION_CLOSE_DELAY_MS);
-        // We do not set the login token on this connection, but instead the
-        // observe closes the connection and the client will reconnect with the
-        // new token.
-        return {
-          token: newToken.token,
-          tokenExpires: accounts._tokenExpiration(newToken.when)
-        };
-      } else {
-        throw new Meteor.Error("You are not logged in.");
-      }
-    };
-
     // Generates a new login token with the same expiration as the
     // connection's current token and saves it to the database. Associates
     // the connection with this new token and returns it. Throws an error
diff --git a/packages/accounts-password/password_client.js b/packages/accounts-password/password_client.js
index 871393127a..d4d53c04d3 100644
--- a/packages/accounts-password/password_client.js
+++ b/packages/accounts-password/password_client.js
@@ -43,27 +43,7 @@ Meteor.loginWithPassword = (selector, password, callback) => {
       password: Accounts._hashPassword(password)
     }],
     userCallback: (error, result) => {
-      if (error && error.error === 400 &&
-          error.reason === 'old password format') {
-        // The "reason" string should match the error thrown in the
-        // password login handler in password_server.js.
-
-        // XXX COMPAT WITH 0.8.1.3
-        // If this user's last login was with a previous version of
-        // Meteor that used SRP, then the server throws this error to
-        // indicate that we should try again. The error includes the
-        // user's SRP identity. We provide a value derived from the
-        // identity and the password to prove to the server that we know
-        // the password without requiring a full SRP flow, as well as
-        // SHA256(password), which the server bcrypts and stores in
-        // place of the old SRP information for this user.
-        srpUpgradePath({
-          upgradeError: error,
-          userSelector: selector,
-          plaintextPassword: password
-        }, callback);
-      }
-      else if (error) {
+      if (error) {
         reportError(error, callback);
       } else {
         callback && callback();
@@ -77,35 +57,6 @@ Accounts._hashPassword = password => ({
   algorithm: "sha-256"
 });
 
-
-// XXX COMPAT WITH 0.8.1.3
-// The server requested an upgrade from the old SRP password format,
-// so supply the needed SRP identity to login. Options:
-//   - upgradeError: the error object that the server returned to tell
-//     us to upgrade from SRP to bcrypt.
-//   - userSelector: selector to retrieve the user object
-//   - plaintextPassword: the password as a string
-const srpUpgradePath = (options, callback) => {
-  let details;
-  try {
-    details = EJSON.parse(options.upgradeError.details);
-  } catch (e) {}
-  if (!(details && details.format === 'srp')) {
-    reportError(
-      new Meteor.Error(400, "Password is old. Please reset your " +
-                       "password."), callback);
-  } else {
-    Accounts.callLoginMethod({
-      methodArguments: [{
-        user: options.userSelector,
-        srp: SHA256(`${details.identity}:${options.plaintextPassword}`),
-        password: Accounts._hashPassword(options.plaintextPassword)
-      }],
-      userCallback: callback
-    });
-  }
-};
-
 // Attempt to log in as a new user.
 
 /**
@@ -172,30 +123,10 @@ Accounts.changePassword = (oldPassword, newPassword, callback) => {
     [oldPassword ? Accounts._hashPassword(oldPassword) : null,
      Accounts._hashPassword(newPassword)],
     (error, result) => {
-      if (error || !result) {
-        if (error && error.error === 400 &&
-            error.reason === 'old password format') {
-          // XXX COMPAT WITH 0.8.1.3
-          // The server is telling us to upgrade from SRP to bcrypt, as
-          // in Meteor.loginWithPassword.
-          srpUpgradePath({
-            upgradeError: error,
-            userSelector: { id: Meteor.userId() },
-            plaintextPassword: oldPassword
-          }, err => {
-            if (err) {
-              reportError(err, callback);
-            } else {
-              // Now that we've successfully migrated from srp to
-              // bcrypt, try changing the password again.
-              Accounts.changePassword(oldPassword, newPassword, callback);
-            }
-          });
-        } else {
-          // A normal error, not an error telling us to upgrade to bcrypt
-          reportError(
-            error || new Error("No result from changePassword."), callback);
-        }
+    if (error || !result) {
+        // A normal error, not an error telling us to upgrade to bcrypt
+        reportError(
+          error || new Error("No result from changePassword."), callback);
       } else {
         callback && callback();
       }
diff --git a/packages/accounts-password/password_server.js b/packages/accounts-password/password_server.js
index 2076985362..7879f5d808 100644
--- a/packages/accounts-password/password_server.js
+++ b/packages/accounts-password/password_server.js
@@ -351,79 +351,6 @@ Accounts.registerLoginHandler("password", options => {
   );
 });
 
-// Handler to login using the SRP upgrade path. To use this login
-// handler, the client must provide:
-//   - srp: H(identity + ":" + password)
-//   - password: a string or an object with properties 'digest' and 'algorithm'
-//
-// We use `options.srp` to verify that the client knows the correct
-// password without doing a full SRP flow. Once we've checked that, we
-// upgrade the user to bcrypt and remove the SRP information from the
-// user document.
-//
-// The client ends up using this login handler after trying the normal
-// login handler (above), which throws an error telling the client to
-// try the SRP upgrade path.
-//
-// XXX COMPAT WITH 0.8.1.3
-Accounts.registerLoginHandler("password", options => {
-  if (!options.srp || !options.password) {
-    return undefined; // don't handle
-  }
-
-  check(options, {
-    user: userQueryValidator,
-    srp: String,
-    password: passwordValidator
-  });
-
-  const user = Accounts._findUserByQuery(options.user, {fields: {
-    services: 1,
-    ...Accounts._checkPasswordUserFields,
-  }});
-  if (!user) {
-    handleError("User not found");
-  }
-
-  // Check to see if another simultaneous login has already upgraded
-  // the user record to bcrypt.
-  if (user.services && user.services.password && user.services.password.bcrypt) {
-    return checkPassword(user, options.password);
-  }
-
-  if (!(user.services && user.services.password && user.services.password.srp)) {
-    handleError("User has no password set");
-  }
-
-  const v1 = user.services.password.srp.verifier;
-  const v2 = SRP.generateVerifier(
-    null,
-    {
-      hashedIdentityAndPassword: options.srp,
-      salt: user.services.password.srp.salt
-    }
-  ).verifier;
-  if (v1 !== v2) {
-    return {
-      userId: Accounts._options.ambiguousErrorMessages ? null : user._id,
-      error: handleError("Incorrect password", false)
-    };
-  }
-
-  // Upgrade to bcrypt on successful login.
-  const salted = hashPassword(options.password);
-  Meteor.users.update(
-    user._id,
-    {
-      $unset: { 'services.password.srp': 1 },
-      $set: { 'services.password.bcrypt': salted }
-    }
-  );
-
-  return {userId: user._id};
-});
-
-
 ///
 /// CHANGING
 ///
@@ -470,12 +397,6 @@ Accounts.setUsername = (userId, newUsername) => {
 // password. `oldPassword` and `newPassword` should be objects with keys
 // `digest` and `algorithm` (representing the SHA256 of the password).
 //
-// XXX COMPAT WITH 0.8.1.3
-// Like the login method, if the user hasn't been upgraded from SRP to
-// bcrypt yet, then this method will throw an 'old password format'
-// error. The client should call the SRP upgrade login handler and then
-// retry this method again.
-//
 // UNLIKE the login method, there is no way to avoid getting SRP upgrade
 // errors thrown. The reasoning for this is that clients using this
 // method directly will need to be updated anyway because we no longer
@@ -497,18 +418,10 @@ Meteor.methods({changePassword: function (oldPassword, newPassword) {
     handleError("User not found");
   }
 
-  if (!user.services || !user.services.password ||
-      (!user.services.password.bcrypt && !user.services.password.srp)) {
+  if (!user.services || !user.services.password || !user.services.password.bcrypt) {
     handleError("User has no password set");
   }
 
-  if (! user.services.password.bcrypt) {
-    throw new Meteor.Error(400, "old password format", EJSON.stringify({
-      format: 'srp',
-      identity: user.services.password.srp.identity
-    }));
-  }
-
   const result = checkPassword(user, oldPassword);
   if (result.error) {
     throw result.error;
@@ -557,7 +470,6 @@ Accounts.setPassword = (userId, newPlaintextPassword, options) => {
 
   const update = {
     $unset: {
-      'services.password.srp': 1, // XXX COMPAT WITH 0.8.1.3
       'services.password.reset': 1
     },
     $set: {'services.password.bcrypt': hashPassword(newPlaintextPassword)}
diff --git a/packages/ddp-client/client/client_convenience.js b/packages/ddp-client/client/client_convenience.js
index 4111eac4cc..4f21582a37 100644
--- a/packages/ddp-client/client/client_convenience.js
+++ b/packages/ddp-client/client/client_convenience.js
@@ -55,13 +55,3 @@ Meteor.connection = DDP.connect(ddpUrl, {
 ].forEach(name => {
   Meteor[name] = Meteor.connection[name].bind(Meteor.connection);
 });
-
-// Meteor.connection used to be called
-// Meteor.default_connection. Provide backcompat as a courtesy even
-// though it was never documented.
-// XXX COMPAT WITH 0.6.4
-Meteor.default_connection = Meteor.connection;
-
-// We should transition from Meteor.connect to DDP.connect.
-// XXX COMPAT WITH 0.6.4
-Meteor.connect = DDP.connect;
diff --git a/packages/ddp-client/common/livedata_connection.js b/packages/ddp-client/common/livedata_connection.js
index 740a7f4abb..320e4d60f9 100644
--- a/packages/ddp-client/common/livedata_connection.js
+++ b/packages/ddp-client/common/livedata_connection.js
@@ -1621,15 +1621,6 @@ export class Connection {
       this._heartbeat.messageReceived();
     }
 
-    if (msg === null || !msg.msg) {
-      // XXX COMPAT WITH 0.6.6. ignore the old welcome message for back
-      // compat.  Remove this 'if' once the server stops sending welcome
-      // messages (stream_server.js).
-      if (!(msg && msg.server_id))
-        Meteor._debug('discarding invalid livedata message', msg);
-      return;
-    }
-
     if (msg.msg === 'connected') {
       this._version = this._versionSuggestion;
       this._livedata_connected(msg);
diff --git a/packages/ddp-server/server_convenience.js b/packages/ddp-server/server_convenience.js
index 28fca40b2b..5d34986053 100755
--- a/packages/ddp-server/server_convenience.js
+++ b/packages/ddp-server/server_convenience.js
@@ -15,8 +15,3 @@ _.each(['publish', 'methods', 'call', 'apply', 'onConnection', 'onMessage'],
        function (name) {
          Meteor[name] = _.bind(Meteor.server[name], Meteor.server);
        });
-
-// Meteor.server used to be called Meteor.default_server. Provide
-// backcompat as a courtesy even though it was never documented.
-// XXX COMPAT WITH 0.6.4
-Meteor.default_server = Meteor.server;
diff --git a/packages/ddp-server/stream_server.js b/packages/ddp-server/stream_server.js
index cf044a1d95..a949633a96 100644
--- a/packages/ddp-server/stream_server.js
+++ b/packages/ddp-server/stream_server.js
@@ -119,16 +119,9 @@ StreamServer = function () {
     });
     self.open_sockets.push(socket);
 
-    // XXX COMPAT WITH 0.6.6. Send the old style welcome message, which
-    // will force old clients to reload. Remove this once we're not
-    // concerned about people upgrading from a pre-0.7.0 release. Also,
-    // remove the clause in the client that ignores the welcome message
-    // (livedata_connection.js)
-    socket.send(JSON.stringify({server_id: "0"}));
-
     // call all our callbacks when we get a new socket. they will do the
     // work of setting up handlers and such for specific messages.
-    _.each(self.registration_callbacks, function (callback) {
+    self.registration_callbacks.forEach((callback) => {
       callback(socket);
     });
   });
diff --git a/packages/deps/.gitignore b/packages/deprecated/deps/.gitignore
similarity index 100%
rename from packages/deps/.gitignore
rename to packages/deprecated/deps/.gitignore
diff --git a/packages/deps/README.md b/packages/deprecated/deps/README.md
similarity index 100%
rename from packages/deps/README.md
rename to packages/deprecated/deps/README.md
diff --git a/packages/deps/package.js b/packages/deprecated/deps/package.js
similarity index 100%
rename from packages/deps/package.js
rename to packages/deprecated/deps/package.js
diff --git a/packages/livedata/.gitignore b/packages/deprecated/livedata/.gitignore
similarity index 100%
rename from packages/livedata/.gitignore
rename to packages/deprecated/livedata/.gitignore
diff --git a/packages/livedata/DDP.md b/packages/deprecated/livedata/DDP.md
similarity index 100%
rename from packages/livedata/DDP.md
rename to packages/deprecated/livedata/DDP.md
diff --git a/packages/livedata/README.md b/packages/deprecated/livedata/README.md
similarity index 100%
rename from packages/livedata/README.md
rename to packages/deprecated/livedata/README.md
diff --git a/packages/livedata/package.js b/packages/deprecated/livedata/package.js
similarity index 100%
rename from packages/livedata/package.js
rename to packages/deprecated/livedata/package.js
diff --git a/packages/srp/.gitignore b/packages/deprecated/srp/.gitignore
similarity index 100%
rename from packages/srp/.gitignore
rename to packages/deprecated/srp/.gitignore
diff --git a/packages/srp/README.md b/packages/deprecated/srp/README.md
similarity index 100%
rename from packages/srp/README.md
rename to packages/deprecated/srp/README.md
diff --git a/packages/srp/biginteger.js b/packages/deprecated/srp/biginteger.js
similarity index 100%
rename from packages/srp/biginteger.js
rename to packages/deprecated/srp/biginteger.js
diff --git a/packages/srp/package.js b/packages/deprecated/srp/package.js
similarity index 100%
rename from packages/srp/package.js
rename to packages/deprecated/srp/package.js
diff --git a/packages/srp/srp.js b/packages/deprecated/srp/srp.js
similarity index 100%
rename from packages/srp/srp.js
rename to packages/deprecated/srp/srp.js
diff --git a/packages/srp/srp_tests.js b/packages/deprecated/srp/srp_tests.js
similarity index 100%
rename from packages/srp/srp_tests.js
rename to packages/deprecated/srp/srp_tests.js
diff --git a/packages/meteor-base/package.js b/packages/meteor-base/package.js
index a8b550e634..3e47ccc3b1 100644
--- a/packages/meteor-base/package.js
+++ b/packages/meteor-base/package.js
@@ -20,7 +20,6 @@ Package.onUse(function(api) {
 
     // The protocol and client/server libraries that Meteor uses to send data
     'ddp',
-    'livedata', // XXX COMPAT WITH PACKAGES BUILT FOR 0.9.0.
 
     // This package uses the user agent of each incoming HTTP request to
     // decide whether to inject <script> tags into the <head> of the
diff --git a/packages/minimongo/cursor.js b/packages/minimongo/cursor.js
index 7bf6a166f5..7c000af170 100644
--- a/packages/minimongo/cursor.js
+++ b/packages/minimongo/cursor.js
@@ -345,12 +345,6 @@ export default class Cursor {
     return handle;
   }
 
-  // Since we don't actually have a "nextObject" interface, there's really no
-  // reason to have a "rewind" interface.  All it did was make multiple calls
-  // to fetch/map/forEach return nothing the second time.
-  // XXX COMPAT WITH 0.8.1
-  rewind() {}
-
   // XXX Maybe we need a version of observe that just calls a callback if
   // anything changed.
   _depend(changers, _allow_unordered) {
diff --git a/packages/mongo/mongo_driver.js b/packages/mongo/mongo_driver.js
index ca6df4897d..fc90b82881 100644
--- a/packages/mongo/mongo_driver.js
+++ b/packages/mongo/mongo_driver.js
@@ -922,13 +922,6 @@ _.each(['forEach', 'map', 'fetch', 'count', Symbol.iterator], function (method)
   };
 });
 
-// Since we don't actually have a "nextObject" interface, there's really no
-// reason to have a "rewind" interface.  All it did was make multiple calls
-// to fetch/map/forEach return nothing the second time.
-// XXX COMPAT WITH 0.8.1
-Cursor.prototype.rewind = function () {
-};
-
 Cursor.prototype.getTransform = function () {
   return this._cursorDescription.options.transform;
 };
diff --git a/packages/oauth/CHANGELOG.md b/packages/oauth/CHANGELOG.md
index e3aae0b3d3..fe40ac1ed1 100644
--- a/packages/oauth/CHANGELOG.md
+++ b/packages/oauth/CHANGELOG.md
@@ -1,5 +1,9 @@
 ## Changelog
 
+## 2.0.0
+### Breaking changes
+- Removed compatibility code for before Meteor v1
+
 ## 1.3.2 - 2020-09-30
 ### Breaking changes
 - N/A
diff --git a/packages/oauth/deprecated.js b/packages/oauth/deprecated.js
deleted file mode 100644
index 180859d505..0000000000
--- a/packages/oauth/deprecated.js
+++ /dev/null
@@ -1,3 +0,0 @@
-// XXX COMPAT WITH 0.8.0
-
-Oauth = OAuth;
diff --git a/packages/oauth/oauth_client.js b/packages/oauth/oauth_client.js
index c7325e4455..0ff507e761 100644
--- a/packages/oauth/oauth_client.js
+++ b/packages/oauth/oauth_client.js
@@ -126,16 +126,6 @@ OAuth.launchLogin = options => {
   }
 };
 
-// XXX COMPAT WITH 0.7.0.1
-// Private interface but probably used by many oauth clients in atmosphere.
-OAuth.initiateLogin = (credentialToken, url, callback, dimensions) => {
-  OAuth.showPopup(
-    url,
-    callback.bind(null, credentialToken),
-    dimensions
-  );
-};
-
 // Called by the popup when the OAuth flow is completed, right before
 // the popup closes.
 OAuth._handleCredentialSecret = (credentialToken, secret) => {
diff --git a/packages/oauth/oauth_common.js b/packages/oauth/oauth_common.js
index 5cd09c462c..3da322b2e7 100644
--- a/packages/oauth/oauth_common.js
+++ b/packages/oauth/oauth_common.js
@@ -1,15 +1,6 @@
 OAuth._storageTokenPrefix = "Meteor.oauth.credentialSecret-";
 
 OAuth._redirectUri = (serviceName, config, params, absoluteUrlOptions) => {
-  // XXX COMPAT WITH 0.9.0
-  // The redirect URI used to have a "?close" query argument.  We
-  // detect whether we need to be backwards compatible by checking for
-  // the absence of the `loginStyle` field, which wasn't used in the
-  // code which had the "?close" argument.
-  // This logic is duplicated in the tool so that the tool can do OAuth
-  // flow with <= 0.9.0 servers (tools/auth.js).
-  const query = config.loginStyle ? null : "close";
-
   // Clone because we're going to mutate 'params'. The 'cordova' and
   // 'android' parameters are only used for picking the host of the
   // redirect URL, and not actually included in the redirect URL itself.
@@ -55,6 +46,6 @@ OAuth._redirectUri = (serviceName, config, params, absoluteUrlOptions) => {
 
   return URL._constructUrl(
     Meteor.absoluteUrl(`_oauth/${serviceName}`, absoluteUrlOptions),
-    query,
+    null,
     params);
 };
diff --git a/packages/oauth/package.js b/packages/oauth/package.js
index 55763a2dc1..2a891f3d41 100644
--- a/packages/oauth/package.js
+++ b/packages/oauth/package.js
@@ -1,25 +1,17 @@
 Package.describe({
   summary: "Common code for OAuth-based services",
-  version: "1.3.2"
+  version: "2.0.0"
 });
 
 Package.onUse(api => {
-  api.use('check');
-  api.use('ecmascript');
+  api.use(['check', 'ecmascript', 'localstorage', 'url']);
 
-  api.use('routepolicy', 'server');
-  api.use('webapp', 'server');
-  api.use('mongo', 'server');
+  api.use(['routepolicy', 'webapp', 'mongo', 'service-configuration', 'logging'], 'server');
 
-  api.use('reload', 'client');
-  api.use('base64', 'client');
-
-  api.use(['service-configuration', 'logging'], 'server');
+  api.use(['reload', 'base64'], 'client');
 
   api.use('oauth-encryption', 'server', {weak: true});
 
-  api.use('localstorage');
-  api.use('url');
 
   api.export('OAuth');
   api.export('OAuthTest', 'server', {testOnly: true});
@@ -41,10 +33,6 @@ Package.onUse(api => {
   ], 'client');
 
   api.addFiles('oauth_common.js');
-
-  // XXX COMPAT WITH 0.8.0
-  api.export('Oauth');
-  api.addFiles('deprecated.js', ['client', 'server']);
 });
 
 Npm.depends({
diff --git a/tools/cli/commands.js b/tools/cli/commands.js
index dc794b53c9..65802f6dfe 100644
--- a/tools/cli/commands.js
+++ b/tools/cli/commands.js
@@ -70,8 +70,7 @@ var showInvalidArchMsg = function (arch) {
 export function parseServerOptionsForRunCommand(options, runTargets) {
   const parsedServerUrl = parsePortOption(options.port);
 
-  // XXX COMPAT WITH 0.9.2.2 -- the 'mobile-port' option is deprecated
-  const mobileServerOption = options['mobile-server'] || options['mobile-port'];
+  const mobileServerOption = options['mobile-server'];
   let parsedMobileServerUrl;
   if (mobileServerOption) {
     parsedMobileServerUrl = parseMobileServerOption(mobileServerOption);
@@ -308,8 +307,6 @@ var runCommandOptions = {
     port: { type: String, short: "p", default: DEFAULT_PORT },
     'mobile-server': { type: String },
     'cordova-server-port': { type: String },
-    // XXX COMPAT WITH 0.9.2.2
-    'mobile-port': { type: String },
     'app-port': { type: String },
     'debug-port': { type: String },
     ...inspectOptions,
@@ -927,8 +924,6 @@ var buildCommands = {
     'mobile-settings': { type: String },
     server: { type: String },
     "cordova-server-port": { type: String },
-    // XXX COMPAT WITH 0.9.2.2
-    "mobile-port": { type: String },
     // Indicates whether these build is running headless, e.g. in a
     // continuous integration building environment, where visual niceties
     // like progress bars and spinners are unimportant.
@@ -949,32 +944,6 @@ main.registerCommand({
   );
 });
 
-// Deprecated -- identical functionality to 'build' with one exception: it
-// doesn't output a directory with all builds but rather only one tarball with
-// server/client programs.
-// XXX COMPAT WITH 0.9.1.1
-main.registerCommand({
-  name: "bundle",
-  hidden: true,
-  ...buildCommands,
-}, async function (options) {
-  Console.error(
-    "This command has been deprecated in favor of " +
-    Console.command("'meteor build'") + ", which allows you to " +
-    "build for multiple platforms and outputs a directory instead of " +
-    "a single tarball. See " + Console.command("'meteor help build'") + " " +
-    "for more information.");
-  Console.error();
-
-  return Profile.run(
-    "meteor bundle",
-    () => Promise.await(buildCommand({
-      ...options,
-      _bundleOnly: true,
-    }))
-  );
-});
-
 var buildCommand = function (options) {
   Console.setVerbose(!!options.verbose);
   if (options.headless) {
@@ -1036,8 +1005,7 @@ on an OS X system.");
     }
 
     if (!_.isEmpty(cordovaPlatforms)) {
-      // XXX COMPAT WITH 0.9.2.2 -- the --mobile-port option is deprecated
-      const mobileServerOption = options.server || options["mobile-port"];
+      const mobileServerOption = options.server;
       if (!mobileServerOption) {
         // For Cordova builds, require '--server'.
         // XXX better error message?
@@ -1605,8 +1573,6 @@ testCommandOptions = {
     port: { type: String, short: "p", default: DEFAULT_PORT },
     'mobile-server': { type: String },
     'cordova-server-port': { type: String },
-    // XXX COMPAT WITH 0.9.2.2
-    'mobile-port': { type: String },
     'debug-port': { type: String },
     ...inspectOptions,
     'no-release-check': { type: Boolean },
diff --git a/tools/fs/files.ts b/tools/fs/files.ts
index 9980d767ff..bac4fa77c8 100644
--- a/tools/fs/files.ts
+++ b/tools/fs/files.ts
@@ -215,16 +215,6 @@ export function getToolsVersion() {
       parsed = JSON.parse(readFile(isopackJsonPath))["isopack-1"];
       return parsed.name + '@' + parsed.version;
     }
-
-    // XXX COMPAT WITH 0.9.3
-    const unipackageJsonPath = pathJoin(
-      getCurrentToolsDir(),
-      '..',  // get out of tool, back to package
-      'unipackage.json'
-    );
-    parsed = JSON.parse(readFile(unipackageJsonPath));
-    return parsed.name + '@' + parsed.version;
-
   } else {
     throw new Error("Unexpected. Git checkouts don't have tools versions.");
   }
diff --git a/tools/isobuild/compiler-plugin.js b/tools/isobuild/compiler-plugin.js
index 9e75edaab6..c5a692c07e 100644
--- a/tools/isobuild/compiler-plugin.js
+++ b/tools/isobuild/compiler-plugin.js
@@ -700,12 +700,7 @@ class ResourceSlot {
   }
 
   _isBare(options) {
-    return !! (
-      this._getOption("bare", options) ||
-      // XXX eventually get rid of backwards-compatible "raw" name
-      // XXX COMPAT WITH 0.6.4
-      this._getOption("raw", options)
-    );
+    return !! this._getOption("bare", options);
   }
 
   hmrAvailable() {
diff --git a/tools/isobuild/isopack.js b/tools/isobuild/isopack.js
index 81ea62b731..a61fce823e 100644
--- a/tools/isobuild/isopack.js
+++ b/tools/isobuild/isopack.js
@@ -124,7 +124,7 @@ var Isopack = function () {
   self.lintingMessages = null;
 };
 
-Isopack.knownFormats = ["unipackage-pre2", "isopack-1", "isopack-2"];
+Isopack.knownFormats = ["isopack-1", "isopack-2"];
 
 // These functions are designed to convert isopack metadata between
 // versions. They were designed to convert between unipackage-pre2 and
@@ -137,12 +137,6 @@ Isopack.knownFormats = ["unipackage-pre2", "isopack-1", "isopack-2"];
 // they were before.
 Isopack.convertOneStepForward = function (data, fromFormat) {
   var convertedData = _.clone(data);
-  // XXX COMPAT WITH 0.9.3
-  if (fromFormat === "unipackage-pre2") {
-    convertedData.builds = convertedData.unibuilds;
-    delete convertedData.unibuilds;
-    return convertedData;
-  }
   if (fromFormat === "isopack-1") {
     // For now, there's no difference in this direction at the isopack level.
     return convertedData;
@@ -215,27 +209,6 @@ Isopack.readMetadataFromDirectory =
       throw new Error("Could not find isopack data supported any supported format (isopack-1 or isopack-2).\n" +
         "This isopack was likely built with a much newer version of Meteor.");
     }
-  } else if (files.exists(unipackageJsonPath)) {
-    // super old version with different file name
-    // XXX COMPAT WITH 0.9.3
-    if (files.exists(unipackageJsonPath)) {
-      metadata = JSON.parse(files.readFile(unipackageJsonPath));
-
-      metadata = Isopack.convertIsopackFormat(metadata,
-        "unipackage-pre2", "isopack-2");
-      originalVersion = 'unipackage-pre2';
-    }
-
-    if (metadata.format !== "unipackage-pre2") {
-      // We don't support pre-0.9.0 isopacks, but we do know enough to delete
-      // them if we find them in an isopack cache somehow (rather than crash).
-      if (metadata.format === "unipackage-pre1") {
-        throw new exports.OldIsopackFormatError();
-      }
-
-      throw new Error("Unsupported isopack format: " +
-                      JSON.stringify(metadata.format));
-    }
   }
 
   return {metadata, originalVersion};
@@ -1060,9 +1033,6 @@ _.extend(Isopack.prototype, {
         };
       }
 
-      // XXX COMPAT WITH 0.9.3
-      builder.reserve("unipackage.json");
-
       builder.reserve("isopack.json");
       // Reserve this even if includeIsopackBuildInfo is not set, to ensure
       // nothing else writes it somehow.
@@ -1347,16 +1317,6 @@ _.extend(Isopack.prototype, {
           delete unibuildJson.declaredExports;
           builder.writeJson(legacyFilename, unibuildJson);
         });
-
-        // old unipackage.json format/filename.  no point to save this if
-        // we can't even support isopack-1.
-        // XXX COMPAT WITH 0.9.3
-        builder.writeJson(
-          "unipackage.json",
-          Isopack.convertIsopackFormat(
-            // Note that mainLegacyJson is isopack-1 (has no "source" resources)
-            // rather than isopack-2.
-            mainLegacyJson, "isopack-1", "unipackage-pre2"));
       }
 
       var isopackJson = {};
diff --git a/tools/isobuild/package-api.js b/tools/isobuild/package-api.js
index ec6fcb401f..186b1841d1 100644
--- a/tools/isobuild/package-api.js
+++ b/tools/isobuild/package-api.js
@@ -622,6 +622,3 @@ export class PackageAPI {
     });
   }
 }
-
-// XXX COMPAT WITH 0.8.x
-PackageAPI.prototype.add_files = PackageAPI.prototype.addFiles;
diff --git a/tools/tests/cordova-builds.js b/tools/tests/cordova-builds.js
index 8c774abd70..78fd702e92 100644
--- a/tools/tests/cordova-builds.js
+++ b/tools/tests/cordova-builds.js
@@ -81,11 +81,4 @@ selftest.define("cordova builds with server options", ["cordova"], function () {
   run.expectExit(0);
   checkMobileServer(s, "https://example.com/");
   cleanUpBuild(s);
-
-  // XXX COMPAT WITH 0.9.2.2
-  run = s.run("build", relBuildDir, "--mobile-port", "example.com:5000");
-  run.waitSecs(90);
-  run.expectExit(0);
-  checkMobileServer(s, "http://example.com:5000/");
-  cleanUpBuild(s);
 });