This was done in an attempt to prevent the warning saying “This file is set to build for a version older than the project deployment target.”
Unfortunately saving all the xibs did not get rid of the warning, even though tehy are all set to have 10.7 as their build target.
The latest xib format does however remove about 10.000 lines of XML.
It’s not feasible to maintain the old-style xib translations while we work on the UI. We’ll soon move fully to constraint-based layout which should allow translations to be purely string-based.