I don't think reddit does a good job of dealing with academic subjects or discussions either. Any /r/{academic_topic} is usually filled with undergraduate-level

I don't think reddit does a good job of dealing with academic subjects or discussions either. Any /r/{academic_topic} is usually filled with undergraduate-level discussion. I think that is a direct consequence of reddit being an insta-community though - it prevents the development of actual-expert communities. There are some good expert communities like /r/askhistorians, and their model certainly works for something like history, but I don't think the same format would really work for something like machine learning or mathematics.