Comment by adiian
I would partially disagree here regarding reddit/HN. They are closer to the old forums than to blogs. You do not follow people, you follow themes, concept, "ideas". They are constituted by a bunch of impersonal people with a common interest.
But those forums were also killed by social media. Reddit/hn along with a few other platforms are modern impersonations of those forums. Also the groups on social media are replacing those forums.
In m opinion "the good content will rise on social media", eventually. But you will have to see 9 junk promoted content for an eventually good one.