I don't think it's quite social media as most people think of it. I treat it more like a message forum.

To me, social media is a broadcast type of media where people are posting for their specific followers and people are following individuals, so you end up with people posting specifically to get more followers (maybe not initially, but it's what fuels further posting).

Hacker News is social, but I don't go here to follow individuals. I usually don't even look at names of who's commenting.