I've been running almost exclusively nVidia lately on OpenSuSE and Tumbleweed and for the most part it just works as advertised. And that's been for maybe 15 years, if not more.
The very few problems I've had were mostly because I poked at the system to install experimental stuff.
From what I've seen, the only potentially troublesome area was switching between an external and integrated gpu on laptops. I never had to do so so I can't really comment.