Or Harbaugh daw the writing on the wall, losing majority of the roster to graduation and the NFL, there was going to be a drop off no matter what even if he had stayed. Not to mention the violations he was facing.
A outside coach minus Saban would have likely lost more the incoming class and would’ve had to get transfers and still have a rough go in his first year.
Look I hope Michigan falls flat, and goes back to what they were in Harbaugh’s first few years and pre Harbaugh. Just saying I don’t think you can put it all on the coaching hire this season, there was logic going for continuity. Their previous few hires all going for the big splash all backfired.