Oh right, Logan's memories. Yes, that makes sense.

Hank just developed an even larger dependency on twinkies instead. And yes, I can see Alex showing up at the school (with Scott?) and Peter Maximoff coming there because of some scrape, and word of mouth bringing other kids who need somewhere to stay... And that all forcing Charles to adopt some responsibility again. Plus I'm sure he would've wanted to find Raven at some point.

(And Erik breaking out from the Pentagon in the regular timeline might have prompted Charles to clean up too.)