Ah, that's fine in theory then - I use a dkms package on Arch too since I use a non standard kernel with VFIO patches for PCI passthrough. Interestingly I see people have reported getting PCI passthrough working with the standard SUSE kernel too, so I'll have to give that a try.

As far as I can see the x11-video-nvidia package in the page you linked has quite an old nvidia driver version for Tumbleweed - https://software.opensuse.org/package/x11-video-nvidia

Again I might be missing something, and in practice it might be easy to install the latest drivers, but this is a bit off putting. I don't know the details of how your build system works or why it keeping up with Nvidia drivers complicated, but this seems like it'd be quite a fundamental thing for a lot of users. The vast majority of people who play games on Linux are going to want recent proprietary Nvidia drivers, so having that as a footnote at the bottom of an article that says it's not recommended/supported doesn't inspire confidence.

Still, I'm intrigued enough to give it a try.