It's necessary when you want to keep track but can't visit very often, or you have too many LJ friends. Do you get comment notifications? Every LJ user should use that, because otherwise you're bound to miss some comments.
I get comment notifications (and they seem to work very reliably, which seems to be an issue for some users) but that's about the only feaure I really use (and I suspect that it was also you who showed me that when I first signed up to LJ).
no subject
Date: 2011-02-10 03:26 pm (UTC)no subject
Date: 2011-02-10 03:29 pm (UTC)no subject
Date: 2011-02-10 03:40 pm (UTC)