How much better would opengl be if they didn't care about backward compatibility across major versions? All the nonsense with glActiveTexture and texture targets would be gone. Smaller APIs in general.
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OpenGL ES 2.0 was nice in that regard since they dropped all the fixed pipeline stuff. They unfortunately kept a lot of cruft :/
But then ES kept all the texture legacy. In GL4.5 we finally have glBindTextureUnit, where the target is not considered. But ES3 doesn’t have it yet. In fact ES3 is missing a lot of goodness you get from GL4.3+.
