I really gave StackOverflow a try, and I have no intention of writing an answer ever again. I took 30 minutes to write a very detailed answer to a question, only to find out that the question has been deleted days later.
Looking at similar questions, there are 40k+ unanswered questions, mostly very low quality and from users with almost no "karma".
Why bother answering, when answers must be accepted by the poster and poster does not even know they should accept an answer in the end?
StackOverflow needs overhaul, but at its current size, we're better off starting something new.