[flohofwoe]

Fwiw on Vulkan or GL it also often makes sense to implement entirely different code paths for different *sets* of supported extensions, instead of handling all possible extension combinations in a single code path (which leads to messy code and a combinatorial explosion of test cases, since each unique extension might theoretically be supported or unsupported independently from all other extensions - but you need to test each combination).

The whole idea of granular and independent extensions is pretty stupid across GL, Vulkan and Wayland. It makes more sense to have a handful "tiers" or "profiles" which guarantee a specific set of features (eg how all other 3D APIs do it) - e.g. Wayland should have a "desktop profile" instead of dozens of optional extensions needed for desktop scenarios, other profiles could be "mobile" and "kiosk".