When trying to find threads on the forum that have not been solved, the only current way to do it is to look for 0 replies. However, sometimes a question has replies but no answer and other times, the original poster solves it themselves.
If there was a method, like on Stack Overflow, to mark the answer for the thread (or even just mark the thread as answered) then the forum could be filtered by answered/unanswered (including using a different colour for answered posts) and we could make sure that people are getting the help they need.