Any MUI 3.8 class that is not "Stefan Stunz" is regarded 3rd party.
Any MUI 3.9 - 5.0 class (AmigaOS) that is not Böckelmann/Maus is regarded 3rd party.
Someone removed my tongue in cheek (though factual) reply saying that "Any MUI class after 3.8 not (c) Stefan Stuntz or The MorphOS Team is regarded 3rd party

"! :roflmao:
Historical revisionism is a nasty scourge promoted by nasty people......