[yellowapple]

"Still, a lot of people on older Windows versions where the GPU drivers are likely out of date enough not to contain Vulkan."

My guess would be that these same drivers would be out of date enough not to contain DX12, so if that's really the target, then there needs to be a fallback to OpenGL and/or an older DirectX.

[Strom]

DirectX 12 is only available on Windows 10, so that's the case regardless of drivers.