> And in my experience there aren't very many great old people that are current with technology, that can code quickly, etc.
That might mean that the great old people are either not great at these things despite their efforts (which I believe is your opinion), OR it could mean the old people optimize for the things you did not list, and don't place too a lot of value on "coding quickly", for example.
> And in my experience there aren't very many great old people that are current with technology
There older I get, the more I realize there is more to life than work. I mean, I love technology, web development particularly (because the web is awesome for humanity), I really do enjoy it. However, I can make better, more fulfilling use of (some of) my weekends and evenings than staring at my laptop, rewriting an app in LatestHypeJS. Is there any other industry that requires much running just to stay in one place?
Bear in mind the "younger faster models" won't stay young forever.