> Unfortunately, WebGL hasn't been updated in a while and it is badly outdated
WebGL implementations have a lot of trouble coping with WebGL 1.0 still. It's slowly approaching "ok to use" status.
A large portion of web users have no WebGL, or a sw-only version of it (SwiftShader in Chrome). This with a 4 year old spec.
With more frequent spec updates WebGL would have lost all credibility due to mismatch between spec and reality, and variation in implementation quality.
Well, big time credibility is something that only a mature tech has, but I'd say surprisingly good. Serious users from many niches as early adopters, and results are of technically high quality (Clara.io, Tinkercad, various medical imaging and architecture stuff), and of course there's the games scene that has the potential to go big. And browser support is on good track with Microsoft and Apple on board now, and a lot of attention on support in mobile browsers.
WebGL implementations have a lot of trouble coping with WebGL 1.0 still. It's slowly approaching "ok to use" status. A large portion of web users have no WebGL, or a sw-only version of it (SwiftShader in Chrome). This with a 4 year old spec.
With more frequent spec updates WebGL would have lost all credibility due to mismatch between spec and reality, and variation in implementation quality.