The Salary Cap and Unlimited Free Agency has changed how the NFL builds and maintains talent.
Most teams basically have a 4 or 5 year window. Unless you have one of the more Elite QB which you can continue to try and build around.
You have to continue to draft well instead of hitting on a few years drafts and stockpiling for an era.
But once you have to start paying the talent , they better be Elite or you won’t be able to surround enough. Even if they are Elite there’s a fine line and then hope everyone stays healthy.
This is why except for Brady and Pats we are seeing more 1 Year wonder teams with very few returning champions even with the best QB’s and what we’d consider best HC’s.
Bill and Brady have the perfect combination in Elite and clutch talent at QB and ability to churn roster not hanging on too long or overpaying. I’m not sure either would have had the level of success without the other.