Vulkan is pretty much out now, waiting for drivers from manufacturers. It comes from a group that Apple works, or at least worked, with. We all know what Metal is, and how is compares (sometimes favorably, sometimes not) to the current OpenGL. If Apple moved to Metal because Vulkan was too slow, then the wait is over and we can get Vulkan next year. Another benefit it they won't be alone working on something. What do you guys think?