I see more and more people set up comments on their blogs recently. If it is linked to Twitter's implosion, was Twitter an alternate comment system then? But we also have reports (for example, NPR) that Twitter didn't impact traffic to the sites much. So then, what is it? Or is it just a trend? I am afraid it's the latter.
I don't have comments on my blog, and I, for now, intend to keep it that way. Email remains the preferred form of conversation for me.