Where did social media go wrong?

Where did social media go wrong?

Yes, Twitter responses are obviously selection bias incarnate -- but looking at the opprobrium aimed at social media from all sides today, I'd think that if anything it understates the current collective wisdom. There was one really interesting response, from a stranger: "The nature of these social networks changed. Is unhappiness the cause, or the result of algorithms surfacing content to make us unhappy?" That's worth pondering.