The Usenet group soc.history.what-if used to be the biggest online forum for discussion of AH. No more. Today this forum is much bigger -- I'd say it gets five or ten times as much traffic -- while shw-i has shrunk to about a third of its peak size. This is part of the general slow decline of Usenet; not many new users are finding it, so most Usenet newsgroups are gradually drying up. Shw-i is still active, though. It gets about two thousand posts a month, and has a couple of dozen regular posters. But there's not much overlap between here and there. A few posters swing both ways -- I'm a regular over at soc.history.what-if, and an occasional poster here -- but not many. Why is that, I wonder? Do people just not know about shw-i? Is there something that keeps them away? Or is this forum just much more congenial? Thoughts? Doug M.