re: Imagine being young and assuming you're going to live until 2070 to 2090

I have bad news for you. Longevity Escape Velocity is expected to be reached by 2035 with some predicting 2030. If you don't know LEV is when the rate of life extension surpasses the rate of aging leading to near immortality. For every year of life your life expectancy increases by more than a year.

It's a great thought experiment to ponder.