I agree with you 100%. We don't see many 65-year-olds around. My intuition is that software engineers are intellectual athletes. Like traditional athletes, our abilities start to dwindle after a certain age. We can't learn new technologies overnight, simply because our brain can't process information as quickly. Our memories become faded. It's sad to think about, but definitely worth planning for.

At the point in my life where I'm financially set for life and ready to move on, I plan to become a pilot in some capacity. Probably not for a traditional carrier, but maybe for sightseeing around NYC, or aerial photography. Aside from technology, flying is my other passion. I'm just not pursuing it commercially because it's a terrible career (salaries start at $20k, and you have to go through security every day. yuck!).