I have a basketcase of a macpro6,1 that has D300 GPUs and therefore kernel panics on the regular, all signs point to a GPU driver issue being the root cause, and on the off chance it's different in Monterey, I would love to give it a try. It can't possibly be less reliable than BigSur right now.
But I can't do that unless I can access my storage because it's my AV workstation and I'm sending things out for prints lately.