WebGL was my first exposure to gpu programming - when I eventually wrote a D3D11 renderer I simply could not believe how much better the tools were. My advice to anyone wanting to learn graphics programming is to start with D3D, the debugging experience is at least 10x better, which makes the whole process so much less painful.
I did my graduation thesis porting a particle engine from NeXTSTEP into Windows using OpenGL, so you can imagine how long I follow OpenGL.
The state of tooling on Khronos APIs is just terrible, there is always this "community should do it" and naturally they are always a shadow of what commercial API SDKs offer in capabilities.
To the point that I think if Khronos was responsible for the Internet only IP would have been standardized.
