I mean a monorepo is basically the modern answer to this, use technology to the solve the coordination problem, its just a different (better) answer. At Windows

I mean a monorepo is basically the modern answer to this, use technology to the solve the coordination problem, its just a different (better) answer. At Windows scale (like Google and FB etc) it would require effort but is do-able, and has been done elsewhere. A multi tiered tree of repositories sounds very complex though, and would require its own effort, amazing it worked at all.