To add to this, AFAIK there are two main reasons why they still have AMDGPU-PRO: it has the more compatible, better-performing OpenCL implementation (which you

To add to this, AFAIK there are two main reasons why they still have AMDGPU-PRO: it has the more compatible, better-performing OpenCL implementation (which you can run alongside Mesa, actually), and until recently it supported slightly different display features, and more compatibility profile functionality. As Mesa becomes more compatible with bizarre certified industrial applications and, and the upstream AMDGPU kernel driver enables more exotic display features, I suspect AMD might choose to just maintain Mesa for these GPUs.