I have to agree here.  Heupel and all these SEC coaches have more money than they can spend.  I genuinely believe Heupel knows Neyland Stadium and UT is one of the top environments in college football.  You could see when he beat Oklahoma last year how special it was for him, so he's not going back there either.
Saw a Clay Travis clip where he says the perfect coach for LSU is Nick Saben.  Pay him 100 million for 4 years.  Why would he do that?  Makes no sense for him to undertake those kind of stresses.  And, the reason he gave for leaving Alabama was the way NIL has changed how coaching morphed into the NFL.  Why would he jump back in?  Answer is, he won't, and Heupel won't head to VT.