I love this article. It's an age-old question. And yes, that's meant to be a pun. But in all seriousness, it's something we all face, but I think aging is more personal thing. Here's a story I wrote a year ago with a similar theme, but a different approach. You should enjoy it: https://medium.com/crows-feet/i-did-the-math-and-the-formula-i-created-confirms-when-you-are-old-25cbb653a5dc