To realize he is playing with house money for the rest of his career. He doesn’t need to win another to be the GOAT.
This coming from a Broncos fan who hates the patriots, yet respects what Brady has done. I used to argue that John Elway was better than Montana simply because he started in more super bowls with far less talent than Montana ever played with, plus he was all around a much better athlete. But once Brady passed them both, and almost has as many super bowl appearances as Elway and Montana combined as well as wins, there isn’t anyone better nor will there likely be another run like he has had. Doing all this while Peyton Manning, Aaron Rogers, Drew Brees, and I’m sure a few other HOF great QBs also were at their prime competing against him.
He’s no John Kelly for sure, but as close to a Joe Elway as you can get.