> If they are so similar that game engine developers will keep Metal around anyway, then we'll see games be built on Metal, not Vulkan, for Mac OS X. And will

> If they are so similar that game engine developers will keep Metal around anyway, then we'll see games be built on Metal, not Vulkan, for Mac OS X. And will use Vulkan on BSD/Linux, with much less problems than you have currently. (Complaining about a lack of open software on a proprietary operating system running on proprietary hardware is a bit silly, isn't it?)