I've been saying this for decades. Also, "You can't have old friends if you're not old."
I was just talking to my 85 year old mother half a world away before I read this. We were talking about my sister taking her on a plane to meet me after a business trip to a place we lived 50 years ago and where I've been lucky enough to have someone pay me to visit off and on for the last six years. You don't get to reminisce about things 50 years ago when you're only 20. Those memories are pretty cool.
Yes, the physical degradation of aging sucks big donkey balls, but it is definitely better than the alternative.