Dxvk/vkd3d, although as seen with arc newer cards might actually implement older dx Standards in such a crappy way that software translation to Vulkan is still faster.
Didn't Intel switch to using d9vk on their Arc GPUs because it was faster and less work than fixing DX9 directly?
Yes, and dxvk was actually available for windows before that and people figuring out that even on AMD and Nvidia you can get notable performance boosts in certain games. Intel just did the sane thing of giving up completely since their implementation was never there in the first place, and from what I heard even the hardware not designed with how those older APIs work, which might give them an advantage over the other two.