[firecall]

I disagree with the often stated claim that HN is social media!

To me, HN is more like an online forum.

IMHO for a service to be defined as Social Media it needs to at least have a 'social graph' of some kind.

HN has never suggested an account to follow, or tried to suggest trending posts or topics to me.

Yes, HN does have a voting system. But that to me doesn't make it social media. HN posts are not measured and promoted based on engagement.