

I should probably add that some of this work is on RDNA3 FSR4 support, which isn’t even supported on Windows. It’s not amazingly fast, but it’s now faster than native and that might be enough to make it worth it (especially in the cases where it improves image quality due to poor TAA implementations).
Valve is one of the main contributors to the RADV Vulkan driver for AMD GPUs, and a bunch of other parts of Mesa and the open driver stack in general.