[Reelin]

I think the person you responded to was comparing OpenGL to Vulkan middleware wrappers from the perspective of API usage. From that angle, whether or not OpenGL drivers are provided at all is completely irrelevant. The API itself will presumably remain available, implemented under the hood via Zink (or similar) on top of Vulkan (or DirectX, or Metal, etc). Such an arrangement is likely to be more stable than middleware that can change overnight at the whims of it's developers.

[abnercoimbre]

As verbose as Vulkan may be, it's a well-designed vanilla C API. Some of the future helper libraries may also be in vanilla C, in which case it's not difficult to version and ensure relative stability.