On the other hand you can't rewrite something every few years just because it will be better. You can always rewrite badly implemented sections if you designed it well in the first place. What I'm trying to say is: Don't do a lighttpd.
"We have much higher leverage on our home court and can do more good for the planet than we can, later, in medicine or politics."
Very interesting suggestion for hackers who want to do some good for society. First of all, make the Web work better, and then you will have already contributed something to society before you retire to do charity work.
