Quora was a very good site when the userbase was small. All the content was very high quality, and I learnt a lot of stuff reading it back then. Now that quora has a very large number of users, it resembles the real world more closely, as in the average quality of content is very low. I am wondering whether there are websites which manage to retain high quality discussions even with a huge user base (HN certainly is one, but I think HN has way less users than quora, and HN is geared specifically towards certain people looking for intellectual excitement).