If you are going to be using the Preferences-iTunes-Maximum iTunes Grouping-Work Name Compatibility option, files will be updated as saved. If you want to rewrite all affected mp3 and aiff files, you can run this action through the Batch Processor. This will ensure that editing the Work Name field in iTunes will not cause a loss of Grouping metadata.
----- Start of action 'Force Save All MP3 and AIFF Files'
----- End of action 'Force Save All MP3 and AIFF Files'
Actions: Force Save All MP3 and AIFF Files
2016-11-17 First release.