In the world of software development, large tech companies like Google and Meta utilize monorepos to manage their extensive codebases, allowing for unified code across multiple projects and teams. Despite the potential challenges of handling millions of lines of code, techniques like "stacking" enable developers to break down large changes into smaller, more manageable pull requests, facilitating continuous development and minimizing delays. This approach, combined with sophisticated CI/CD systems, ensures seamless integration and delivery of code, mitigating risks of deployment failures. While traditionally the domain of tech giants, tools like Graphite now democratize these practices, enabling smaller teams to adopt stacking workflows and enhance productivity. The evolution of these methodologies highlights how structured processes and advanced tooling can significantly improve code quality and delivery efficiency, benefiting teams of all sizes.