I don't game a lot, but when I do, I want to be able to. QubesOS runs on the Xen hypervisor, so none of your qubes touch bare metal. Running anything directly in dom0 defeats the purpose. Yes, I could do GPU passthrough, but cloud gaming has come a long way. Soon there won't even be a need for a gaming PC. I practice what I preach as far as privacy and security through isolation and compartmentalization, and I've found nothing better that still functions as a daily driver for business and every other area of my life. It's built for OPSEC, so it works like my brain works.