I don't object to being old, I would like the opportunity to go back exactly 30 years ago, I would make changes but that would probably be banned.
In terms of being smarter, I suppose part of that is the opportunity to read more non fiction, it does seem to pay off when it comes to answwering questions on University Challenge
https://www.youtube.com/watch?v=EfaA7md3GVY
There are people who say that they can predict changes, they say that 2028 major step change year, I would like to still be around for that.