I have a VFIO setup as well but with dual GPUs. As you say, it is pretty awesome. I keep setting up other OS's for fun. I have an old nVidia NVS300 card that

I have a VFIO setup as well but with dual GPUs. As you say, it is pretty awesome. I keep setting up other OS's for fun. I have an old nVidia NVS300 card that is supported natively under macOS, and also fired up a WindowsXP setup for grins. There were some interesting snags in getting each one going, and I learned a lot along the way. The Arch wiki is indeed spectacular.