Such projects have phases of development. If too many people get involved too early, you easily create a "too many cooks in the kitchen" situation. But once t

Such projects have phases of development. If too many people get involved too early, you easily create a "too many cooks in the kitchen" situation. But once the long-term architecture is largely defined and implemented, there's usually enough inertia and established compartmentalization of modules that more developers can participate without ruining the soup.