Clay Shirky writes an interesting theory that people who invent new technology need not be restrained by the "experience". As we all live by our experience, the older you get, the worse of entrepreneur we become, as we are bound by elder concepts that may no longer be valid. While this has some kick, I have to say that the history always repeats itself, and maybe in the short run, not thinking about the past can create a fad, but in the long run experience is certainly key to success.