It is finicky on any distribution because NVIDIA drivers aren’t perfect on Linux nor on Windows.
That being said I’m gaming, in VR and otherwise (using native games, Proton ones, Steam VR, etc), or running local AI models (thus via CUDA) on a daily basis on Debian and have no problems. You can check https://wiki.debian.org/NvidiaGraphicsDrivers but it’s basically just installing the driver like any other package. I don’t have more or less problem than with e.g. Ubuntu. It basically works.
" Number of supporters: 141" and 375 upvotes, something doesn’t add up.