re: What age is a “good” age to die?

Depends on one's quality of life at any particular age, ST. Cost v benefit. Health weighs heavy; mind and body.

And depending on if one has 'responsibilities' toward young beloved. That might mean one would be willing to hang on and suffer in order to help those you love.

I know this, things start going down pretty fast at 70. Use it or lose it.

Good luck.