Respectfully, have to disagree.
If he succeeds at Alabama over the next two-three years and continues to show recruiting prowess he will be an NFL offensive coordinator or Power 5 Head Coach by the time he is 33-34 years old.
I don't think you can say Notre Dame has anywhere near the same track record of Steve Sarkisian, Lane Kiffin, Bill O'Brien, Mike Locksley, & Jim McElwain. Regardless if those guys succeed at their next place of employment, they got those jobs in part because of their connection to Nick Saban and the Alabama Program.
That would be a legit argument, but let's evaluate all of those OC's shall we?
Sark - He was a HC at Washington and USC, and coached under Pete Carroll prior to taking a HC gig. He went to Saban because his career flamed out and he's done less than stellar at UT.
Kiffin - Like Sark, was a HC with the Raiders, Tennessee and USC prior to joining Saban's crew and again, coached under Carroll at USC. He also had a very disappointing 3rd year at Ole Miss.
O'Brien - Like Sark and Kiffin, was a HC with Penn State and the Texans prior to joining Saban and coached under Bill Belichick and is now back there after just 1 season.
Locksley - Has been passable at Maryland, but nothing special, and like the other 3, already had a previous HC stint prior to Bama.
McElwain - The one legit brought up OC and while he had a good stint at CSU, he flamed out at Florida.
Hard for me to give a ton of credit to Saban, when 3/5 OCs were ready made and had already ran programs themselves.