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Re:BeOS: The Alternate Universe's Mac OS X by terminaljunkid on Thursday January 09, 2020 @01:03PM (#22003683)
Yes, in short - users & groups serve as a rudimentary implementation of capabilities. Best example is Android. But there's more to it.

Separating admin user from non admin user always has advantages and I do it even on Windows.

Re:BeOS: The Alternate Universe's Mac OS X by anyfoo on Thursday January 09, 2020 @04:18PM (#22005881)
Best counter example to their point is iOS, though, where POSIX permissions don't play much of a role in securing the system and separation applications.