Naturally there are a number of organizational growing pains with this kind of trajectory. If you are not keen to be part of organizing yourself and teams into a way that scales up, and instead you want things to be already well established (read: orderly, one tidy package) even before you arrive, then it might not be the place for you. Frankly, I find it really motivating and energizing so I wouldn't list this as a "con" for myself.