I have a close friend who is a Bills fan and i watched from five feet away his agony at those four Super Bowl losses, the last two where my buddies and i were whooping it up during those Cowboy victories.
True story the first Cowboy game he lived out of town and left a pregnant wife in hospital waiting to deliver so he could watch the game with his buddies, with her blessing (she was/is awesome), .. second child.. lol.
Looking back it's amazing just how good those teams were, 4 straight Super Bowls, and the greatest comeback in playoff history with their backup quarterback, wow.
CA Smith is right a really good franchise, well run until Wilson got really old and they began to drift. It will be interesting to see if they might move.
As a Canadian ex-pat i can tell you there would be huge support up there as the NFLs first international franchise.
RIP.