I think the recent Foobar2000 changes align well with Mp3tag's recent changes and other applications.
•Improved tag compatibility with other software.
◦“Album artist” is mapped to ID3v2 TPE2 like in WMP/iTunes.
◦Support for iTunes “itunescompilation” tags, in MP3/ID3v2 and MP4.
◦ID3v2.3 tags are now written by default since version 2.4 seems to be widely ignored by software vendors.
◦Added support for multi-value WMA tags.
◦Special work-around for "AC/DC" artist in ID3v2.3.