There's always this deluge of posts of the absolute horror of nVidia in Linux.
Yes, nVidia is an evil capitalistic company. No they don't care much about Linux. Except when it suits them. Right now it's in the data center.
But then, AMD doesn't care that much either. Why would they, there aren't really any Linux users. They're both soulless corporation that would sell your children's kidney's without a second thought if they could make a dollar from it.
Now in practice, whatever you use, stuff mostly works 99.5 % of the time. There's no difference between nVidia and AMD (or intel), they all work fine.
Don't get drawn in stupid corporate dick sucking contests, it's completely pointless. Use what you want, or what you have, it doesn't matter.