I started using Nvidia cards with Linux about two years ago and haven't had a single issue so far. It has always been Ubuntu, so that might be part of it, but I get the impression that Nvidia's beef with Linux isn't an issue anymore.
(I recognize that there have been issues with Wayland support in the past, it creates issues for some developers, and support for modern Nvidia cards on most other operating systems is non-existent. There are likely other issues, but it seems like most of the issues would affect a small number of people.)