While I would like to champion AMD a bit more because Nvidia has been doing some anti consumer shenanigans, I have to say that at this point, the Linux support is good. It is a bit of a myth or perhaps just outdated info that if you want to have a headache-less experience, you need to use AMD. For new hardware, it may even be a bit better than AMD to be honest.

The only difference is that updating is a bit easier on AMD, after all, mesa just updates with your OS. But this is merely a note on convenience.