You know people talk about that all the time but it's not totally clear that teams really have done that. Buffalo and KC probably had a little more short term flexibility in roster construction as did Philly last year, the Seahawks were able to keep a good team together around a cheap rookie for a while, but generally speaking it's actually pretty unusual for the right things to match up (team has to be bad enough or incredibly luck to draft a good QB but then good enough to be good by year 2 or 3 that it's worth piling up for the short term. The window of when you have a lot of salary cap space because of your rookie QB starts to close in the player's fourth year.And why exactly are they conserving again? Isn't the young QB on a rookie deal this huge advantage in cap allotment that teams have used to put together contenders? Wasn't 2022 and 2023 precisely the time to keep making splashes before you either have to pay Mac or move on to start yet another rebuild with a different QB?
Also the Pats did try and maximize that window, and they spent the cash money on Jonnu Smith.