The DigitalOcean team successfully migrated their React-based frontend architecture from a monolithic repository to a monorepo, achieving significant benefits in terms of developer velocity and code organization. The migration involved several stages, including making the change easy, colocating apps, and optimizing the monorepo. The team used automation scripts to manage the process, minimizing human error and ensuring reproducibility. Key takeaways include the importance of careful planning, effective communication with developers, and a focus on measurement and optimization during the migration process. The monorepo has enabled faster deployment, easier maintenance, and improved isolation of dependencies, leading to a more scalable and resilient frontend architecture.