I see now why Brands has been hellbent on pilfering ASU. I kid!
Even as an Iowa fan, I am surprised to see how relatively big the gap is between 2nd and 3rd in terms of AA production "over time."
But, this kinda feeds into what I think is the most concerning thing about the program and that is the relative low number of champs (your graphs don't elucidate this point but others have made it, and it's easy to look up). Recruits may already be thinking "Iowa will make you pretty good, but won't get you to the top".
As for the original topic, I have a hunch that the Brands won't seriously consider retiring until after they get one more team title. But maybe they'll be forced out by the end of the current contract (2029). In either case, we can kick the can down the road for a few more years