Yeah, social media has pretty much everything that the forums have or used to have. However, forums still have two great advantages:
1. No one has to reveal their identity and therefore there's less worry about things getting too personal, people getting upset, going after people, etc. (I mean, it still happens but it's nicknames going after nicknames, which in my view is pretty harmless). Arguably, one could have face Facebook identities, etc. but that would be such a hassle. Having a nice throwback to the non-intrusive internet is nice... Even though Curt has everyone's IP's and can apparently do some "fancy research" to make sure we are alive. Which may be a good thing. Especially if the other members of the forum are worried sick. Because they are little girls and their tootoos are tootoo tight and their undies are riding up in their bums and...
But I digress.
2. They allow for a longer-than-140-character sentences, which for some of us are necessary to express ourselves (see 1. above). I've been watching Californication and call me an old fart (and go ahead and feel lucky that I don't know your true identity) but I am on the same page with the main character guy there - the tweeting is killing the language.
3. What dmiles said about following at your own pace. And because of 2, forums read a lot nicer than twitter threads.
Did I say two advantages? Well, fuck-a-dee-doo-da, I meant three.