...Both strategies work well and both have drawbacks as well. splitsh helps use both strategies by providing tools that automatically synchronize a monolithic repository to standalone repositories in real-time. splitsh-lite is a sub-project that provides a faster implementation of the git subtree split command, which helps create standalone repositories for one or more sub-directories of a main repository. If you want to learn more about monorepo vs manyrepos, watch this 4-minute lightning talk I gave at dotScale (or read the slides)... or watch the longer version from DrupalCon. "The Monorepo - Storing your source code has never been so much fun" is also a great resource.