With Proxmox on AMD gpus, it can be as simple as picking a pci device from a dropdown.
-- but then again, you'll need to learn how to properly use proxmox, esp. with respect to storage configuration. Also, the performance can still suffer, depending on various factors.
If it's not too big of an inconvenience, dual boot is the way to go, IMHO.
You wanna get tivoized? Ha? Because that's how you get tivoized.