A few weeks ago, I installed linux (Nobara, if you're curious) on my PC and hooked it up to the living room TV to use as a gaming console. I have absolutely no regret. I did it initially because apparently playing games on a shared screen is better for my kid. But I was pleasantly surprised by how smoothly Windows only games run on Linux. The whole experience has been great, and I don't think I'll ever go back. I have an nvidia gpu as well, which apparently does not work very well on Linux. For me, on Nobara, it's been working flawlessly.
The most annoying thing I encountered was the Switch controller support being rather poor. Every button press was somehow interpreted as two different buttons at the same time and I had to figure out which commands to run on Terminal to stop it from happening. Even then, the bluetooth connection on my PC was so bad that I had to stay within 3 feet lest the controller disconnects. I don't really think this is a Linux issue per se, but I recommend people buy a couple of 8bitdo controllers on Amazon which come with USB dongles if they want to go this route.
I will miss games that I can only play with mouse and keyboard, but I think there are enough games out there with controller support that this is not going to be an issue.
NVIDIA driver progress has been massive over the past year, I wouldn’t consider it much less stable/supported than AMD cards.
I use an 8bitdo controller and they work very good in linux, I use the dongle instead of the bluetooh connection
Keyboard & mouse user here. To lessen the pain, I moved to gyro-based gaming. I think 8bitdo has those. I specifically use the Switch joycons. I recommend you just get yourself a good BT dongle.
The Steam Controller will be such a blessing when it comes out.
The "Nvidia on Linux compatibility" issues are something I wonder if I have side-stepped somehow either by lucky choice of GPUs, or lucky choice of Linux distros.
Was/is this a distro thing, or an actual issue?
Every Nvidia I've used [1] has worked perfectly, from the change for Xfree86 to Xorg, through the Compiz desktop wobbly window craze, to the introduction of GPGPU APIs like CUDA/OpenCL and recently Vulkan.
I do recall once helping a friend setup a Debian and a Ubuntu machine with Nvidia (which I never used before) and it took some figuring-out of how to install non-free drivers, so maybe my choices of Gentoo and Arch (not being as conservative towards non-free licenses as Debian/Ubuntu) always made it a non-issue?
[1] 6800 Ultra, 7800 GTX , 7900 GTX, 8800 GTX, GTX 280, GTX 480, GTX 680, GTX 760 Ti, RTX 2080, RTX 4080... probably missed some.