Family? Are we so broken that it doesn't pop out as an obvious choice? In China (lived there 10 years) I feel like many would accept this without even a moment's hesitation.
So the scenario plays out: you get too old to have fun, so you metamorphosize back into a baby, which your now-adult children have to take care of. This is just as labor-intensive as care for the elderly you would have been, but now they have to go through the psychological horrors of knowing their mother/father is now a child in their care, adding to their load of possibly already trying to raise a family of their own?
No, like putting that aside, because I assume that it’ll exist. I’m thinking more along the lines of, how do you satisfy the emotional needs of an adult who is trapped in a body that is not responsive to them? If I behaved like I do as an adult to my parents and teachers but I was a child I’d spend my entire youth in the timeout corner.
You'd have to pray your caregivers give you food that you actually like before you get teeth and the ability to walk.