We already have a solution to overpopulation: birth control. Longer lived people have more memories and skills, so of course our capacity would increase -- if n

We already have a solution to overpopulation: birth control. Longer lived people have more memories and skills, so of course our capacity would increase -- if not counteracted by neurological senescence. The trick is to regenerate the person to a youthful state, where they can be productive and creative yet retain their knowledge and skills. I don't expect it to be easy, but people in cryostasis can afford to wait a while.