State of sys-gui-gpu

I would like to ask the community what the current state of sys-gui-gpu is?

As far as I can see sys-gui is still experimental and continues to be experimental in QubesOS 4.2. I’ve played around with sys-gui and sys-gui-gpu (on Intel UHD Graphics 620) in the past, getting the former to work the latter not (haven’t really tried harder).

I certainly believe it is a reasonable idea to isolate the GPU in a separate VM and would like to use sys-gui-gpu in the future.

Has anyone been using sys-gui-gpu successfully on Intel integrated graphics?