One of the many things that made Red Auerbach a genius is his awareness that things change.
People. Life. The world. Culture. Business. Sports.
But, he retained strength in the certainty of things that did not change.
Like, for example, his determination to kick the ass of any opponent who's trying to beat him.
My first Fedex job in 1988, they said this: "The one constant here at Fedex is change." So, don't get used to something because you've done it a long time, or because changing from it seems uncomfortable or inconvenient.
Belichick (and Kraft) are emotional, determined individuals, with their own personal beliefs and values and system of thought and work regimen. They mostly don't deviate (or learn or change) because it's 'worked' for them, overall. It's their security blanket.
Obviously, compared to Red Auerbach, Phil Jackson is an idiot. But, for his time, in the era in which he coached, Phil got it right and deserves credit.
Tom Brady did make a lot of people here look good. I think it's important to acknowledge that it's scary for anyone to go outside their personal comfort zone. And, with all the laurels and success behind them, why would Kraft or Belichick want to sign up for that now?
For this reason: There is a ton of potential success and prosperity ahead. Yes, the time left is limited. But the fundamental flaws in their approaches, which Brady overcame, will never go away without their awareness and support. They're each just so isolated and entrenched in their own worlds that it looks like it'll only happen as soon as Kraft restores the old logo & uniform permanently (which will be never).