That's interesting to consider. Some of the GNU code is getting quite old and looking through it is a blast from the past. I'm frankly amazed that it continues to work so well. I suspect there is a relatively small group of GNU hackers out there rocking gray and white beards that are silently powering the foundations of our modern world, and I worry what's going to happen when they start retiring. Maybe we'll get rust rewrites of everything and a new generation will take over, but frankly I'm pretty worried about it.