What is a major “I’m getting old” moment you’ve experienced?

I made a pop culture joke about the Olsen twins with someone who is Gen Z and he responded with “Who the hell are they?”

As somebody who grew up wearing their clothing line, cosmetics, and perfumes from Walmart, read so many of the book series based on the adventures of Mary-Kate and Ashley and consumed so much Mary-Kate and Ashley media, I couldn’t fathom living in a world where younger adults wouldn’t know who the fuck they were anymore when they were such a big part of my childhood and early pre-teen years. I had to lie down for a moment after that one.