[HollywoodZero]

I'm not a developer, but a PM. I wonder if in the age of GitHub, if this node to root process still exists the same fragmented state.

Any devs with insight?

Doesn't, the modern git approach make it MUCH easier for developers to get more immediate changes to the codebase?

[nhoughto]

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.