I think it goes in cycles.
You had usenet, AOL chat rooms (who does that now, outside of pervos trolling for jail bait?), then you had forums, and twitter/reddit, then instragram, and now...well, not sure what it is people do.
I'd bet that most of us here are between the ages of 29-45. There are some people outside of those ages (iirc, there was the older gentlemen who was in his 70's on here...whatever happened to him?), but mostly it's not full of younger posters.
And thank god it's not.