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by MBCook 4405 days ago
What I believe he means is that if you have an OpenGL driver that implements the ENTIRE specification (correctly and in a performant manor) then you have basically all the features of a modern DirectX 11 card available.

The problem is that many OpenGL drivers implement the base OpenGL specs and then a couple of extensions here and there. Because of this you can't rely on what's available and you end up with something that's more akin to a mix of many previous versions of DirectX: some advanced capabilities but many basic ones missing.