The organizational structure doesn't have to be reflected in the built artifact(s), though. Just look at Chrome. It has who knows how many teams working on it,

The organizational structure doesn't have to be reflected in the built artifact(s), though. Just look at Chrome. It has who knows how many teams working on it, but gets built into a single giant DLL (or executable, depending on your platform). And newer languages like Go and Rust make it easier to link everything into one big artifact like this.