It isn't because OpenGL is better. It's simply inertia. Don't take my word for it - take Carmack's. http://www.tomshardware.com/news/john-Carmack-DirectX-Ope

It isn't because OpenGL is better. It's simply inertia. Don't take my word for it - take Carmack's. http://www.tomshardware.com/news/john-Carmack-DirectX-OpenGL-API-Doom,12372.html http://www.tomshardware.com/news/john-Carmack-DirectX-OpenGL... I do all my graphics work in OpenGL, but I'm aware of its shortcomings.