You'll NEVER see a mainline airplane between BUF and LGA? Funny. In 1999 I flew a DC9 on that city pair. In (early) 2001 I did it again in a 737-300.

Sadly, Rakesh Gangwal used 9/11 as an excuse to darken the sky with an armada of RJs thus virtually eliminating career prospects for those of us who flew small, narrowbody, mainline equipment.