It’s all about the QB. Reid got an elite QB and all of a sudden his narrative went from ‘can’t win the big one’ to ‘maybe best of all time’.
If McD moves on and wins a superbowl with a different team while the Bills remains superbowl-less during Allen’s career then we’d know where the issue lies. If the Bills replace McD with a different coach that takes this team to a superbowl then it’d be clear where the problem was. Most, if not all, of us think it’s the latter scenario so let’s cut ties and move on.