Disclaimer: I don't know how DX11 works, how Vulkan works, and how DXVK translate DX11 into vulkan commands
With this, we can support something like crossfire/SLI on games that doesn't support crossfire/SLI at all, giving new life for those old multi GPU cards like HD 7990 and R9 265x2, assuming that Vulkan multi GPU works on Linux driver, DX11 can be translated into multi GPU vulkan without all the problems associated with original crossfire/SLI...
Disclaimer: I don't know how DX11 works, how Vulkan works, and how DXVK translate DX11 into vulkan commands
With this, we can support something like crossfire/SLI on games that doesn't support crossfire/SLI at all, giving new life for those old multi GPU cards like HD 7990 and R9 265x2, assuming that Vulkan multi GPU works on Linux driver, DX11 can be translated into multi GPU vulkan without all the problems associated with original crossfire/SLI...