he accomplished his mission at michigan, he's free to leave.
if he does leave, i cant see michigan staying at this level for long. theyre really the only program that got to compete with the big boys without big boy star recruits. i think that's 100% harbaugh. im not sure anyone else can do it.
i would love to be proven wrong. and i dont think michigan is going to use their NIL like the ohio state's and alabama's of the world use their's (i.e.: against the actual rules). i cant see michigan offering players millions (or even hundreds of thousands) up front.