Their GPUs should also work really well in linux, since you don't really need DX11/DX9. All games with those graphic APIs get translated to Vulkan by [DXVK](https://github.com/doitsujin/dxvk) anyways.
You don't really need DX10 and lower on Windows anymore either, dgVoodoo2[1] is routinely used (along DXVK) on Windows itself because of how better supported DX11/DX12 and Vulkan are by modern drivers.
I hope someone will benchmark a game with DX9+dgVoodoo2 vs native DX9.
