How are these kids going to get their homework done with YA gone? Will their parents step up to the plate?

Their parents will be getting a refresher on Calculus.

There were no computers when I went to University, and no semesters-  one exam in  Dec. and June.  You'll manage.  :)

Brainly, Chegg, Slader, and various other resources. 

Another website will replace YA.

Isn't it the opposite?  People will have more time to get things done in the real world.  People seem to waste a lot of time here by asking and answering mostly meaningless questions instead of doing real things in the real world.  Sure, there are occasionally meaningful questions and meaningful answers but there are many different ways to get those.  I wouldn't put a lot of trust in answers found here, there are a lot of dishonest users.  It's fast and convenient, sure, but so is fast food.  Not much nutrition.