"Andrew Binstock: You are one of the fathers of the
open-source revolution, even if you aren't widely heralded as such.
You previously have stated that you released TeX as open source
because of the problem of proprietary implementations at the time,
and to invite corrections to the code--both of which are key
drivers for open-source projects today. Have you been surprised by
the success of open source since that time?
"Donald Knuth: The success of open source code is perhaps the
only thing in the computer field that hasn't surprised me during
the past several decades. But it still hasn't reached its full
potential; I believe that open-source programs will begin to be
completely dominant as the economy moves more and more from
products towards services, and as more and more volunteers arise to
improve the code..."