AskUbuntu and AskDifferent are the only large Stack Exchanges with no minimum assumption of knowledge.
We are not "Q&A for experts". We are "Q&A for everyone", and frequently "Q&A-driven tech support".
Many problems with AskUbuntu — its low quality questions, its small middle class, its muted downvote culture — may be incurable.
At least under current constraints.
We are a inclusive community using software tuned for exclusiveness.
StackExchange tries to thresh out and bury chaff. Ubuntu attracts people inclined to pick it up.