Monorepos can unlock significant productivity gains, but only if your team is prepared to invest in infrastructure, developer experience, and disciplined workflows.

Shifting from a monorepo to a polyrepo isn't just a matter of splitting code it's a rewrite of your entire developer workflow. Dependency boundaries, shared libraries, and tightly coupled CI/CD pipelines often make the transition painful. In this post, we explore when each model works best, why companies like Facebook and Netflix took different paths, and what to consider before making the switch.