I'm curious if you have kids?
This proposal could be thought of a couple ways. Maybe I prematurely age 20 years? That sounds pretty bad. I'm currently 42. That would make me effectively 62. With twin 3 year olds and a 6 year old. That doesn't sound fun.
But what sounds even worse is they won't graduate from high school until I'm 77. Decent odds I would die before then. Even with 10 billion. Fuck that.
The other interpretation could be: the world moves on but you "fast forward". Well, I likely get to see my kids as adults, but it all zipped before my eyes.
And that sucks too. Things moves so fast at younger ages, and so far from 0-6 each age is unique, different experience. And I would never want to fast forward over that.
Maybe if I were still hanging out, playing games, and talking with friends - sure. What's 20 years - maybe I'm a little worse at games. But kids change the whole thing for me.