The negative aspect is creating a microcosm of people who may think the same thing. If you don't take care to inject new talent or slightly change the business' direction, the risk is that everyone will see the problem the same way. Somewhere, you have to step back to be able to resolve it differently. The discussion about incubators may focus on a vision that is too similar among the various participants.
On June 2nd, 2015. See this statement in context.