What makes you think the staff would all have to be replaced after Manny leaves?
Maybe, and I’m not advocating it, Rad (?) and Zo ‘help’ Manny hire new staff, especially on offense and new DC. Find an elite OC and have 2022 an audition for HC in 2023.
Do what OU did to Bob Stoops….push him out and promote the OC, like Lincoln Riley.
Stoops didn’t retire for health reasons. He couldn’t win the big game. After 2000’s NC he won a lot, but lost three NC chances (L$U, U$C, and UF) I can think of. And a few other bowl games. OU recognized Riley’s talents and figured, why not?
Far fetched, I admit