I do worry that a huge swathe of people have become too emotionally dependent on it in lieu of real human relationships. I see a lot of people right now stressing out about how much they're going to miss all their 'friends' and, maybe for some of them that's true, but is it really a meaningful friendship if it can't survive a website going down? I mean I'm aware that I'm posting this HERE, but at least Moopy has a degree more intimacy as a smaller community, and at this point I use it to stay in touch with people who I've primarily actually met in person at least a handful of times. Are twitter moot-meets a thing? They must be to some degree, but you never hear of them.
Also, this goes beyond Twitter to Whatsapp, Insta etc, but the number of absolute horror stories I've heard from my teacher friends about cyber bullying, revenge porn etc being increasingly prevalent, in many cases before kids even hit their teens. It does make me wonder if there'll be a moment (perhaps now) when we all just pull back from it a bit and recalibrate, or (more likely) we just migrate to the next thing and become even more toxic and terminally online.