I am not a huge fan of thinking that the next two seasons are some sort of window due to cap space. That is really not a thing. i think it is something like 2 of the last 20 Super Bowl winners had QBs on a rookie contract.
A great QB will win more rings than a cheap one.
The good, young rookie contract QB window is very real but a relatively new phenomenon. While that may be the case for teams actually winning the superbowl, I'm sure in the last 10 years the number would look quite different for teams that made the post season.
No doubt you'd always rather know you have a great QB for a decade but realistically, what're the odds Mitch becomes a great QB?
I like Mitch but the odds are against that happening for him and almost every other QB.
But with the large salary cap edge a team has with a solid to above average QB on a rookie qb contract, your QB doesn't have to be great because you can build a stacked roster.
They only have to be good which is much more realistic