I believe that AMD has flipped the script on this in recent years. From what I recall, AMD has been actively releasing a large amount (if not all) of their drivers as open source for integration into the Mesa driver (which I think is the same driver than handles Intel graphics as well). Arguably speaking AMD GPUs work more out-of-the-box now than NVidia do.

That said, I switched to an AMD card about a year ago as an upgrade from an Nvidia. My Nvidia never gave me issues, it was just getting a little long in the tooth (gtx 1050 ti upgraded to a RT 6600)

Isn't it still true that a Nvidia card is better for gaming with Linux than AMD or Intel?

No. Intel has best drivers, AMD has decent drivers. Both are well-integrated into system. On nvidia there are nouveau and blob. Nouveau supports not every feature, blob just breaks system.

Not for VR, unfortunately. Have a valve index collecting dust, streaming to the quest 2 via ALVR runs better.