This article is so full of obvious false information, the most important is: "OpenGL ES 2.0 was the same as OpenGL 3.3, somehow." VAO is the final GL feature.

This article is so full of obvious false information, the most important is: "OpenGL ES 2.0 was the same as OpenGL 3.3, somehow." VAO is the final GL feature. There is no point to use anything other than OpenGL (ES) 3+ for eternity. Copying the wheel over and over is the trap.