[tgrass]

Here's a Planet Money podcast on manufacturing (http://goo.gl/rEg8) in which you can hear how the world changed around a button maker, but he did not evolve to match the changes.

Also, in my unstudied opinion, the theory seems to go that those who are best at launching a new venture, are not necessarily the best to run it long term. These require different skill sets. To profit most from your entrepreneurial skill set means getting out once that skill is no longer required by your business.

And finally, in the recent (last two decades) business environment research has shown the most likely new companies to survive are those that are 'disruptive', one set of criteria is considered to be cheaper and poor quality - so as not to incite the competition to try it your way (forgive the lack of citation). The theory suggest that working towards sustainability (that is, not looking for an exit) is statistically a doomed strategy. Just like they say about stockbrokers though: past performance does not guarantee future results, so take that theory cautiously.