Because for being such a minimalist editor, it requires something that a lot of hardware out there doesn't have and that often requires proprietary drivers.. even though it doesn't need it.

Yes, also what I thought.

For me it was as simple as installing mesa-vulkan-drivers and re-launching rx. It is a very nice and minimal editor - well done

It doesn't seem to work for vmware with debian, because vulkan is a pain to get working if it's even possible?