Edit: Reading parent's link, it looks like there were two complaints: First, OpenGL 1 era features haven't been completely removed--merely marked deprecated, as JWZ loudly advocates. Second (and this took up most of the article) OpenGL 3.0 was not feature-competitive with DX11, which is a bit silly, given that DX11 wasn't available at the time. As of the present day, and as far as I know for most of the recent past, the latest version of OpenGL has maintained feature parity with current hardware and therefore DirectX.