I've had my gaming machine on a separate box for awhile now. Games and their DRM have been getting worse and worse. Even games like Kerbal Space Program, which I loved, harvested all your browsing data. Like, seriously, WTF?

So I've kept all that garbage on its own box. It's nicer that way anyway, since I don't use Windows as my daily driver it helps me keep a Windows machine around for other toxic software like Photoshop.

I previously did it in a VM with GPU passthrough, which worked quite well and I think is a decent option for people who can't afford the cost/space of a second machine. Nowadays, thanks to the death of Moore's Law, I had a perfectly capable older machine lying around that I could use instead. That's slightly less maintenance, since the GPU passthrough would occasionally need twiddling after qemu or kvm updates.

EDIT: I will add, for the couples years I was doing GPU passthrough, I didn't notice any difference in performance compared to when I moved the same GPU over to a physical box. In fact, there was this weird audio bug that I originally thought was because of the VM, but it persisted on the real machine and turned out to just be a bug in NVidia's audio driver. So besides the maintenance burden, GPU passthrough was great.