Nowadays, yes. Back then, systems could barely run the OS they came with...

Thanks to huge protracted union fights. You’ll find the credits in an old US-produced movie—say, Gone with the Wind—are much more sparse than in one from the last decade or two. Incidentally, those fights happened too early to include CGI artists, and those often do go uncredited (undercredited?) even today.

Not that the Hollywood unions are a definite positive in all respects, or that the whole idea of fighting an oligopsony by establishing a monopoly in the shape of a cooperative doesn’t ring warning bells in my mind. But the movie industry absolutely would not credit most people if it could get away with it, and I wouldn’t expect the software industry to be any different (barring rare early pre-financialization examples[1]).

[1] https://www.folklore.org/Signing_Party.html