This one was 8chan, not 4chan. While I'm nothing more than an occasional passive observer of the chan communities, it seems that most of the "talent", so to speak, has left 4chan amidst increasingly strict rules against various forms of tomfoolery.

As far as I understand most of the work was done on 8chan because the 4chan moderators banned discussions of the live stream from /pol/, but most users of the /hwndu/ board on 8chan originally came from 4chan's /pol/.

>it seems that most of the "talent", so to speak, has left 4chan amidst increasingly strict rules against various forms of tomfoolery.

I don't have any number to prove this but to me it seems that the overlap between 8 and 4chan is huge. There's very few 8chan users that absolutely never visit 4chan anymore. 8chan is tiny in comparison to 4chan so the signal-to-noise ratio may seem better there. (according to their front page they get roughly 2k posts/hour, if it was a 4chan board it would be medium-sized and 3 times slower than big boards like /b/, /v/ or /pol/)