Where are all the old people with ADHD?

I've been thinking about how older generations with ADHD handled things growing up. I feel like I’ve never noticed an older person who clearly has ADHD. A lot of older people seem to enjoy things that, from my perspective as someone with ADHD, feel incredibly boring and simple. I honestly can't imagine living in their shoes for even a couple of days without getting restless or losing it.

So, where are all the older people with ADHD? How did they cope growing up, and how are they managing now?