You can. Go ahead and do it. Mesa is likely to implement future OpenGL extensions by translating them to Vulkan rather than implementing them natively to the me

You can. Go ahead and do it. Mesa is likely to implement future OpenGL extensions by translating them to Vulkan rather than implementing them natively to the metal, and someone is probably going to make a libgl that targets Vulkan rather than any of the intermediary layers used around the ecosystem.