Oh no doubt they would be incredibly lucky to find a QB half as good as TB when it comes to winning. There are plenty of posters who say TB is a system QB. I always respond in kind. Who cares? What team wouldn't want a QB that fits their system? IMO any winning team has a system QB. Call it the system, as long as it brings victories I'm good with it.
As a Bills fan it pains me to say this but it's Brady BB would be stupid not to retire with him.