I can say that number is at least 1. I enjoy gaming, but I have been fully on Linux for a few years now. My PC builds always need high CPU performance, both multi threaded for compile workloads and single threaded for games, as well as good graphics performance for gaming, especially due to VR games. I am essentially the reverse of your described use case: I want high gaming performance with ML and GPGPU as a bonus.

I like what I am seeing in regards to the new AMD cards vs. my current RTX 3080 for gaming performance. Especially since Nvidia has raised prices to a point I am no longer even begrudgingly willing to pay. But, as I am currently playing around a bit with stable diffusion I am more inclined to stay with CUDA for the time being. However this is a very recent change in interests, so I am not sure whether my priorities will change long term. I am also not planning an upgrade any time soon, so I will wait for new developments on all sides.