I think IAA is one of the few good places left on 4-ch.
My intuition suggests to me that the confluence of poor (and entirely too visible) management, including shitty mods, with an influx of personalities and egos even on /dqn/ (I'm not going to say the T word), has begun to drive good posters away. And certainly I've been spending less and less time on the site. I don't really expect quality conversations anymore. Instead I jump in and stir the hornet's nests and leave, because damn if those hornets don't deserve it.