CJ Mosley, Dant'a Hightower, Ha Ha, Julio Jones, Amari Cooper. Landon Collins. Derrick Henry. Seem to be doing ok.
I don't see it as a Saban thing. Kids respond well or don't respond well to the NFL and responsibility every year. Some can handle it. Some can't. It's not like Nick has a glaring history of flameouts at the next level.