AMD is slowly but surely expanding support for Radeon cards. It's not as extensive as Nvidia, but it is improving. ROCm supports RDNA2 now and RDNA3 support is coming this fall.
https://community.amd.com/t5/rocm/new-rocm-5-6-release-bring...
https://community.amd.com/t5/rocm/new-rocm-5-6-release-bring...
Which is funny because it’s so obvious.
Imagine buying a CPU from a vendor, trying to run an application on it, and then finding out “oh I needed to get the blah blah blah x variant”.
Ridiculous, right? That’s AMD GPU, even before you get to the disaster that is their software.