that of Parseghian, Holtz and Devine. It's not a quibble. It is a big gulf.
And the ND of those eras was far more attractive as a place to coach, relative to all other options, than the ND of today.
Harbaugh and Meyer would do well at ND. I see neither ever coming regardless of the amount of money.
Harbaugh wouldn't be at Michigan were it not for his alumni status, something Michigan alums understand well (and that is why they fully expect him to merely relaunch the program after staying 5 or so years).