Yep. I mean...
We've got newsgroups, hosted blog comments (like disqus), normal blog comments, email lists, usenet, forums (in all their infinite variety from oldschool phpBB to newer offerings like muut), reddit (and similar sites like hnews), google groups, RSS feeds, pingbacks, Stackoverflow and friends, Facebook groups, whatever G+ has, and probably two dozen other related products, clones, variants and crossbreeds I'm not even thinking of.
...all in an attempt to solve the same basic problem, ie, me and some other people I don't really know and who won't be online at the same time would like to chat, post stuff, and maybe find stuff that has been posted before, hopefully with the ability to build a sense of community, low barriers to entry, good usability, and decent filtering, moderating, and admin tools.
I admit, it's a hard problem. But it seems like one in an unusually unsolved state, given the sheer amount of interest and work that's gone into it over the many many years we've been trying. Newsgroups date back to 1979-1980, and looking at the Facebook groups my girlfriend happily participates in, I'm not 100% sure we're any closer to solving the underlying issue. In fact, I'm afraid we might be further. It's weird.
Edit: To be clear, I'm not suggesting we should have—or will ever have—one product that solves every use case. I'm wondering why we don't seem to have a product that really solves even one use case yet. Disqus or Facebook are widely used, but hardly perfect or loved. And then there's stuff like the Wikipedia project, which uses aggressively unfriendly tools for internal discussion and organisation; I have no idea how that ever seemed like a good choice.