The key takeaway, for me, is: * outsiders can bring some fresh thoughts and challenge ideas that everyone inside keep as status quo and unchallenged; * people

The key takeaway, for me, is: * outsiders can bring some fresh thoughts and challenge ideas that everyone inside keep as status quo and unchallenged; * people who define themselves as e.g. 'Ruby on Rails dev' (or JavaScript dev or whatever) might have hard time adapting if the landscape changes, or they need to do something outside their comfort zone; * specific technical skills (programming language, etc) are usually easier to develop than soft skills such as leadership, teamwork, communication. Of course, it's not unconditional. Sometimes you really need someone who has deep knowledge of some niche, or is really a master at some technology. It's just probably not as common as one might believe.