The article explores the benefits and challenges of using a monorepo setup for managing multiple Go projects, highlighting the use of Earthly as a tool to streamline the build process. It describes how a monorepo can contain multiple Go modules, such as microservices and shared libraries, and outlines the structure and configuration required to make them work together efficiently. The text explains the advantages of using the "replace" feature in Go's `go.mod` file to facilitate local module imports and discusses the importance of efficient build tooling and caching to avoid unnecessary rebuilds in development and CI environments. Additionally, it covers versioning strategies for microservices within a monorepo and emphasizes the need for loose coupling and independent management of build, test, and release cycles. The article also addresses some common drawbacks of monorepos, such as potential complexity in build tooling and the risk of tightly coupling components, while offering solutions to mitigate these issues.