My favorite: "It’s ok to make mistakes but it’s not ok to be timid." I know in silicon valley that sort of thinking is encouraged, but in most of corporate America it's very rare.
In a relatively mature segment, operational discipline is more important than big ideas and plans. Since the reward system is different, it attracts different people, and a more suitable mentality.
This is heavily related to why it's so often that the best people from a growth company leave as the business matures -- the skills that make you great at growing a company will not make you equally successful at managing an existing business, even aside from the fact that growth-company people usually don't like doing the more mundane tasks of a later-stage business.