Hindsight is always 20/20.

In hindsight the separation of GL and GLES was pointless IMHO (at least up to 2.x).

It led to GPU vendors to only offer GLES drivers besides the GPU supporting GL (according both the marketing and https://github.com/ptitSeb/gl4es) and made porting standard linux apps to arm platforms needlessly difficult. Note that even with GL4es you have to port the shaders manually to GLES.

Vulkan is a big improvement to that.