We got the first Mike because of some sort of raging fanbase that wanted a head coach with ties to Coach Bryant, a guy who had zero relevant experience for the job. I didn't understand this monarchial succession either then or now. (Look how many assistants under Saban were colossal screw-ups as head coaches).
We got the second Mike for a more logical reason: "he's been able to win more with less in rural eastern Washington, and he might be the right guy to see us through on this probation thing. Look at the quarterbacks he's developed!"
We got the third Mike because the first two Mikes were mistakes and the alternative was to get on the wrong side of a sociological issue by hiring the black guy and then getting blistered when he was inevitably fired fighting years with one hand behind his back. The blowback on firing Shula was 1/100 what it would have been had we fired Croom after four seasons (and Croom's petulance and childish ways against us at MSU show our hunch was right).
On a side note, go look at the coaches hired after the 1996 season. It's one of the least distinguished lists of new hires you will ever see. Jim Tressel would never have gotten a look outside of Ohio (not then), and you have names like Bob Davie, Joe Tiller, Bob Toledo, and Fred Miller. Gary Barnett had led Northwestern to the Rose Bowl, so his name was huge when he went to Colorado, and Tommy Bowden had a history with us as he went to Tulane.
But that listing of coaches hired in the offseason is one of the most undistinguished in modern history.