[beervirus]

I learn stuff on HN every time I visit. Reddit is (somewhat) entertaining, but I don’t usually learn anything important there.

[the_af]

Doesn't this depend on the subreddit? Some are "chatty" or full of memes, but others are very informative for some niches.

If you want a subreddit for enthusiasts of $NICHE, you're likely to find it, and it's likely to be useful.