Not really. On some/several/many Nvidia cards (I had a few), one can't even boot with a stock Ubuntu CD, because Nouveau has (unfortunately) a very lacking support, and proprietary drivers are not preinstalled by default on the CD.
AMD's drivers are at least open source and integrated in the kernel. On the other hand though, having owned several Nvidia and AMD cards, I didn't find any brand to be noticeably more stable than the other (each one had issues).
In my opinion an open-source driver not written by Nvidia and an Ubuntu ISO not packaged by Nvidia aren't indicators of Nvidia "just work"ing or not. There are many distros where Nvidia drivers come installed out of the box.
(where I can help it. Mobile is obviously a forced-obsolescence dumpster fire)
nvidia driver on the contrary has always been reliable
Then this opinion can be discarded as not grounded in reality. In order to run pytorch at high speed I need to do... basically nothing. It just works.
Many things can be said about ROCm support for 7900XT, none of them are positive. "It just works" drivers from AMD come several months too late.
The experience is different for everyone it seems.
I can play almost all single player games, whether they officially support proton or not; the only major game I have been unable to play (despite following all instructions online) is Gris.