Also, this seems like some major revisionist history:
>This leads us to the other problem, the one Vulkan developed after the fact. The Apple problem. The theory on Vulkan was it would change the balance of power where Microsoft continually released a high-quality cutting-edge graphics API and OpenGL was the sloppy open-source catch up. Instead, the GPU vendors themselves would provide the API, and Vulkan would be the universal standard while DirectX would be reduced to a platform-specific oddity. But then Apple said no. Apple (who had already launched their own thing, Metal) announced not only would they never support Vulkan, they would not support OpenGL, anymore.
What I remember happening was that Apple was all-in on helping Khronos come up with what would eventually become Vulkan, but Khronos kept dragging their feet on getting something released. Apple finally got fed up and said, "We need something shipping and we need it now." So they just went off and did it themselves. Direct X 12 seemed like a similar response from Microsoft. It always seemed to me that Vulkan had nobody but themselves to blame for these other proprietary libraries being adopted.