[hburd]

There is a name for this phenomenon, it is called Conway's Law: https://en.wikipedia.org/wiki/Conway%27s_law

More recent commentators have noted a corollary - for software projects with a long lifetime of code reuse, such as Microsoft Windows, the structure of the code mirrors not only the communication structure of the organization which created the most recent release, but also the communication structures of every previous team which worked on that code.