There are people who were at OpenDNS in the early days who were incredible, and as we grew, became less and less incredible, largely because the things that made them incredible actually started to be really frustrating as the company grew and they didn't want to change those things. So they had to leave. Usually it was a series of conversations about how the person, their peers, and the company were all unhappy, and…
In his classic book Accidental Empires ( http://www.amazon.com/Accidental-Empires-Silicon-Millions-Co... ), Robert X. Cringely wrote that if you think of a market as an invasion beach you can think of three kinds of employees at tech companies: commandos, infantry, and police. Commandos are people who love challenges and hate structure. They'll happily take on missions that other people think are crazy or impossible,…
But for sure, Its important to recognize that this is what the growth pattern looks like, and does highlight that needs and roles change; if you can't or won't, you gotta go - not because you're a horrible commando, but because they only need infantry now.