Fun story about why I'm such a curmudgeon about this:

Long before Proton even existed, I once researched how to run a Windows VM for gaming on a Linux host machine, with GPU passthrough. At the time I had an Intel iGPU and an Nvidia discrete GPU, so I figured the iGPU could run the host, while the discrete GPU could run the guest.

I asked around reddit and some of my tech savvy friends on what the best distro would be to accomplish this. A few people steered me toward Debian, because I expressed concern that the system wouldn't be stable or would be difficult to work with.

Well, turns out Debian was a fucking terrible choice. First I had graphics driver problems, naturally. Secondly, I couldn't even install qemu if I wanted to because it wasn't in the apt repositories that shipped with Debian. So I had to learn to add those. Then I had to learn how to stop Debian from recognizing the nvidia GPU during boot, so that the PCI device could be reserved for the passthrough. That was a monumental headache to figure out. And finally, once everything was set up, I learned that nvidia had more or less disabled their consumer-grade cards from being used in a virtual machine. I spent over a month trying to get that working, and eventually just said fuck it and stayed on Windows. And I caught a ton of flak for that, because obviously I should have known that nvidia was a bad choice of GPU, and I should have just purchased an AMD GPU instead... in the middle of GPU mining bubble, when cards were going for $500 a pop.

I'm really hoping to not have a repeat of that experience.