Every 20 year old is going to be a 90 year old someday (if they are lucky). Complaining about age is unnecessary, because all those young people you see running around and envy…
You can be content in knowing they’ll pine after youth the same way in a few decades. You can feel smug in knowing that they too will despair in a midlife crisis and look in horror upon the wrinkles in the mirror. That they too will feel the fathomless sadness of knowing that all the things they dreamed about and never achieved will weigh them down deep into murky depth.
That they too will live in the future as old people and not get to fully enjoy its marvels.
You may rejoice, for you have already climbed that mountain. You stand on its peak or near enough, and soon you will jump off into everlasting oblivion…
You may achieve biologic immortality, but you will still age mentally, get jaded and bored. Unless someone also invents being mind wiped after so many centuries. But then you might as well just die normally again right? What is the difference between a person who has no memory of their past and a new person.