I am also interested in this... I used to like Reddit a lot, but I feel their push to reach a broader audience has pushed down the quality of the front-page subs. It is dominated by a sense of moral superiority: "Am I the Asshole", "Justice Served", Leopards ate my Face" are very common now.
I like Quora because of specific authors that write high-quality answers (mainly mathematics).
I like Quora because of specific authors that write high-quality answers (mainly mathematics).