Patriots like to stay on top of the game similar to the way the 49ers did it back in the 80's/90's.
People thought Montana would retire as a 49er. Brady will end up with another team in a couple years or when his contract is up.
I think Montana was let go Because the 49ers had a QB of Young.
Pats traded their Key Back-up this year.....So Unless they get someone Good, I don't see Brady going anywhere. IMO
That's the key right there. I do believe (depending on how he performs this season) that they'll start to consider drafting a QB in the very near future. A late rounder like the did with Brady.
Yes he'll retire a Colt, but his counterpart Brady will not retire a Patriot.