Probably several issues at play. A huge one has to be conference realignment. With OU and Tx going to SEC, rumors of Pac12 changes, possible B1G changes the pressure grows exponentially for ND to join a conference. And the most likely landing spot is the ACC. Perhaps he does like that prospect. Or the B1G and he doesn’t want to play third fiddle to O$U and Mich.
Plus being the ND coach comes with huge pressure that dwarfs what the AKB CAC dishes out daily. Alumni there are very demanding.
The escalating arms race. ND is a small school in a small town in a nondescript Midwest local. Hard to recruit, and thye may not have the deep pockets to compete with lazy rivers. Or, even if it does have the mullah, the admin may not be willing to build up. Perhaps they think mystique alone is sufficient. Or think such consumerism is beneath them.
Or just tired of cold winters.....