Comment by d-us-vb

You won't be bringing your own graphics card to RadiantOS. According to one of the pages, they want to design their own hardware and the graphics will be provided by a memory-mapped FPGA.

If your question is about the general intricacies in graphics that usually have bugs, then I'd say they have a much better chance at solving those issues than other projects that try to support 3rd party graphics hardware.