While surely there are few hackers older than 60 or 70, the history of the personal computer is still too young for the question to be a meaningful indicator of how long people keep hacking. The Altair came out in 1975 meaning that someone that was 20 at the time and started hacking on it right away is only reaching 60 next year. The first mass-market personal computer (the Macintosh) came out in 1984 and working with computers was still a niche at that time. Those hackers that are over 60 now are either super early adopters or those that started hacking late in life, so in any case a very small group. I'm sure there will be plenty of hackers over 60 in a few decades :) - Also, looking forward to fragging and playing Starcraft in the nursing home! :)