Vulkan has a lot of features made specifically so that implementing portability layers like DXVK and Zink would be possible and performant. This has been a key

Vulkan has a lot of features made specifically so that implementing portability layers like DXVK and Zink would be possible and performant. This has been a key project in the past few years and lots of work went into it. For more info, look up Vulkan portability initiative.