Like others have already said, if you want Foss drivers then AMD is your only choice.
However, if you want the most performant cards on the market then you can safely choose nvidia. The drivers work really well now, no tinkering required. Even multi monitor vrr works now with the latest drivers.
Stop listening to what people are parroting, nvidia used to be a bad choice, but not anymore. Even Linus Torvalds has changed his mind
So, when AI people came in, that was wonderful, because it meant somebody at NVIDIA had got much more involved on the kernel side, and NVIDIA went from being on my list of companies who are not good to my list of people who are doing really good work.
I got a 3080 and I have not encountered any issues on the latest drivers, released a few days ago.
Before that, I had a minor issue (artifacts) on some websites when on a high refresh rate. Fixed with latest drivers.
My next card is going to be nvidia, too.