Conway’s law indicates that a system will follow the same structure as the communication systems that produced it.
Its flipside is that it also means that groups organized and used to communicating in one way are likely to have trouble understanding systems created by a different communication structure than the one they use. Systems designed following a different communication pattern will make less sense, or at the very least seem less elegant to them.
This is likely another reason new teams coming into an existing codebase prefer to rebuild than maintain - the mental overhead of having to reverse engineer and adapt to a different team’s communication system is more taxing than building from scratch.