SDW was, unfortunately, a long time coming because nearly all of the interactions he generated outside of this thread were negative and hostile. And, imo, it was at least somewhat troll-ish. Although some really do think he is unhinged.
RR, Fawlty, and Homer should all be here imo, because they all had more positive interactions than negative ones. And they were all long-term mainstays of the board.
From a purely capitalistic perspective, having RR, Fawlty, and Homer keeps people around. Having the endless cycle of right-wing trolls like Yorkist, Kandyland, Whippy McGee, Papi Chulo, and Horse Style drives people away.