Yeah, it's all about the tooling. The distributed system I used was when I worked at Amazon. Each "package" there has its own git repo, which can have multiple

Yeah, it's all about the tooling. The distributed system I used was when I worked at Amazon. Each "package" there has its own git repo, which can have multiple branches and the dependencies of each branch are versioned along with the branch. I wonder if at the end of the day it really matters whether something is a "monorepo" or not if the tooling provides the necessary abstractions to version things the way you need.