I think most of this is just WebGL 1 (AKA OpenGL ES 2) versus WebGL 2 (AKA OpenGL ES 3). If you restrict yourself to the basic parts of WebGL 1 your app will w

I think most of this is just WebGL 1 (AKA OpenGL ES 2) versus WebGL 2 (AKA OpenGL ES 3). If you restrict yourself to the basic parts of WebGL 1 your app will work almost everywhere, as compatibility is excellent on all recent phones and OSes. There’s a lot of nice stuff in WebGL 2 (eg float textures, vertex textures) but as soon as you try to use it you either sacrifice compatibility on a bunch of devices, or you have to check for various extensions to try to figure out what’s going to work, and try to fall back gracefully if possible.