I'd be interested whether anybody would like to see core profile related topics separated from compatibility profile related topics, or told in another way: legacy OpenGL topics separated from modern OpenGL topics. Personally, I would.
I see the following benefits from separating them to two different sub-forums:
1. People who are more familiar with legacy OpenGL could more easily find topics where they can help, and the same for those more familiar with modern OpenGL.
2. It would be easier for everybody on deciding what solutions to suggest for questions, e.g. one hopefully won't suggest the use of display lists to solve a particular problem one asked about in the modern OpenGL forums.
3. I think it would be a more clean separation of topics than the existing beginner/advanced separation which tends to show no practical benefit in most cases.
I'm open for praise and blame