Brady has all the late career skills as Favre, but like Favre, he can't win the big one in later career and twice against arguably the weakest match ups in Super Bowl history.
It's a team sport, not an individual sport. Saying "he can't win the big one" is a false argument when there's 53 guys on the roster. If Asante Samuel or Wes Welker could catch when it mattered, you'd be saying something entirely different. It's not Brady's fault those guys had the Lombardi trophy in their hands and dropped it at the end of the games.
It's not just yards and completions but the big picture and there's nobody as good in the game as the 2001-2004 Brady, not even Brady. He had the mental game as well and that's a big part of why NE went three complete and ultimately successful seasons for four in Super Bowls in that time period.
It's impossible to do, but if you put '04 Brady against '13 Brady ceteris paribus, '13 Brady would kick '04 Brady's ass every time.
What was the difference between the Pats beating the Eagles in 04 and losing to the Giants 2 years ago? Defense and pass protection.
Experience is key but I will take youth and fewer overall injuries in a QB if their arm is true. On so many levels in SF, Alex Smith may have been the more consistent and experienced QB over Kap, but Kap's fewer injuries and fewer snaps led him to get starting job. Smith downplayed concussions two seasons before but it did do its damage. When things are all equal, a physical sport like football takes its toll on any single human being and if game plan and coaching is solid, take the youngest, strongest guy in every position possible. The 80s most successful Super Bowl QB was Montana and he was done as full starter at age 34. The 90s most successful Super Bowl QB was Aikman and he was out of full time job at 33. They have a total 7 Super Bowl championships together but nothing lasts forever. The 00's dynasty of course are the Pats with Brady with their 3 big wins but I don't expect Brady to buck the trend and get bonus time and make it happen this decade. No sport has anybody stay at #1 as top hero for 20 years.
Honestly, just because Montana or Aikman couldn't play til they were 40 doesn't mean anything with regards to Brady. Every player is a different person. Just because a couple of superstars from the early 90s couldn't make it to age 40 doesn't mean every player ever won't be able to do it. Flutie did it, Testaverde did it, Favre did it, Warren Moon did it. There's plenty of examples of athletes playing into their 40s.
Hell, Jaromir Jagr was one of the best players on the ice last night for
both teams in the
Stanley Cup Finals at age 41. He doesn't have the fastest legs anymore but the guy still has more skill than 90% of the players on the ice. Two years ago I watched a 43 year old Mark Recchi fly around the ice beating guys who were 15 years younger than him. And this is in hockey, a sport that's more physically demanding and harder on an athlete's body than football.
So we know it's possible to be competitive as a pro athlete into your 40s, but whether Brady can do it or not doesn't hinge on what one specific player did in the past, it hinges solely on this:
Brady's turning 36 later this summer. He's playing the best football of his career and has gotten better with age, not worse. The type of game he plays relies mostly on his brain, football IQ, and decision making, not his mobility or athletic ability. As long as he can keep his arm strong and accurate, he can still play. The mental side of his game isn't going anywhere, and is only going to continue to get better.
As for Coach Bill, he's one of the best coaches and since his job is not physical like the players, there's nothing saying that 61 is old. Yes, if Bill were a player, even some old kicker like Blanda, then there's an absolute limit even with the least chance for physical contact. But Bill is a coach and if he is in football for another two decades, then it's no surprise to me. Coaches do not make their careers around any one player as the depth and stars of New England now and in the past have shown, and there's no reason for him to hang it up anytime soon or even in ten years. If he does leave soon, there's going to be somebody who will offer him an amount he can't refuse and that's a nod to all the ex-coaches who have been brought back, even to very sorry teams.
I don't think Bill is worried about money or will be letting money influence his decisions. He's already set for life. Bill's been coaching football for over 4 decades. There's a chance that in a few years he'll want to retire and spend time relaxing on his boat, traveling, etc. I wouldn't be surprised if he did, but I also wouldn't be surprised if he coaches until his 80s. It will be interesting to see for sure.