But they don't all support 1.4. I don't get the change from specifying what api is needed. If DirectX version x.x requirement is a thing, it only makes sense to do the same for Vulkan version x.x requirements. Particularly since Vulkan is not just about the device, but the os used too
Add:: also this is about systems that are vulkan incompatible, not systems that vulkan devices aren't being found. But like with the 620, it's compatibility is limited (at least on windows, Linux seems pretty reliable for vulkan though) and may not be able to use the most recent version of vulkan