I have to disagree: founders of the most successful and admired companies stick around for long, long time. Neither of Brin, Page, Gates, Moore or Yang think there are more interesting activities than running their companies.
Maybe that's why there aren't many new googles around: entrepreneurs have "more interesting" activities in mind they need to make a quick $5M for.
I didn't say it was impossible that one's interests would coincide exactly with customers' demands, just unlikely. Of course it will happen occasionally, and those founders are obviously going to do particularly well.
Incidentally, though, Gates did just find that there was something more interesting to do.
Maybe that's why there aren't many new googles around: entrepreneurs have "more interesting" activities in mind they need to make a quick $5M for.