My hypothesis is that 99% of the people who use Stackoverflow only visit the QA part of it and things like the community wiki and chatroom receive minimal traff

My hypothesis is that 99% of the people who use Stackoverflow only visit the QA part of it and things like the community wiki and chatroom receive minimal traffic. From talking to a few dozens of users, most people don't even know that the chat room and wiki exist! The current number of users in the Stackoverflow chat rooms > with 100 users currently talking in 57 rooms. The usage of the chat is shockingly low. I think there's room to provide a better learning experience for developers and providing chat rooms for developers is a low hanging fruit IMO. People here on HN know about IRC and how to use it, but we represent a very small fraction of the population interested in programming, so the idea is to tend to the general population eventually.