I say keep it. Yes, there may not be any new traffic coming, but the archives
make an
interesting read (that's the only reason I keep MY group around!).

Yes, there are dozens of Kate fora out there, and of those there's really only
one
worth reading (and even that one has been really slowing down, too). Most of
them
could go away and nobody would miss them (especially the Kate Yahoo! group), but
this is not one of them.