Boomerang kids to bounce out sooner due to self-driving cars
They call them boomerang kids.
The word “kids” is rather misleading since the ages involved are typically young adults, so substitute the notion of kids (i.e., toddlers to teenagers) to instead mean offspring as in your kids that you faithfully raised and sent out into the harsh real-world.
For the boomerang aspects, it’s a clever metaphorical device that suggests a situation or aspect wherein you toss something into the air, and it manages to come back to you.