Forum discussions are very useful to find answeres for technical problems. most of the time we come to particular question by searching.
Some times it is difficult to know the particular thread is the one related to our case. Some threads are so long, it take time to realize it is the one we are looking for or not. There are un necceasry information due to mis interpretatoin of the question too. Somebody ask question, other ask more details or give wrong answer, the owner of the question give more details again. This become bit messy. This waste valuable time of the forum user who read the forum to find matching thread.
I think it is useful to have summary for eatch problem specially solved problems.
We can re state the user question properly, make the right answer by the informaiton in the thread. it will be very short, just the question and answer.
We do have a feature already in placed called Question & Answer pairing. If the author marks a reply as it answering their question it automatically pairs that response with the question at the top of the discussion. You can see an example of Q&A pairing here.