>Blogs aren't "realtime", so they don't solve any problems that people went to social media for.

Curious, what is your basis for this assertion that "realtime" is the primary reason for social media? I think "realtime" has created this incessant need to watch and feed the machine. That has been an interesting diversion for a while, but I can't see it as healthy long term, IMO. I, and many others I know, check up on friends once or twice a day and then got on with our actual lives. With a less frenetic and more sane model of interaction, "realtime" is way down the list of important attributes.