Couple of things here. Firstly, he's a magnet for these offers right now across the country at both NCAA and NFL for various positions.
Taking SC job - it's risk and reward. Nice salary, lots of exposure, antsy fan base. He'll have a short leash and lots of unknowns moving into the B1G. Not sure he has a lot of talent. And - he's stalling re: bringing in all of his staff thing. He's got other negotiations concurrently.
He's got some coin in the bank. 10 year NFL guy. We'll see, but my guess is he'll pass on high risk SC and take an HC NCAA job in a P5 or a DC spot in the NFL this December.
If he comes to SC, the recruits will too. Talent won't be an issue. Kids will flip, portal will have plenty to choose.
Not sure about B10 being an unknown, JL knows exactly what SC would need to do.
I agree it could be a short term hire, the mid level HC jobs will be plentiful. Love to have him for a couple years...