Despite its advantages, the monorepo approach presents unique challenges that require careful consideration and specialized tooling.

Perhaps the most prominent challenge is performance:

as the repository grows in size and the number of projects increases, traditional build, test, and linting processes can become prohibitively slow. This impacts developer productivity and CI/CD efficiency significantly.

Another challenge is cognitive overload. With many projects in one place, navigating the codebase and understanding interdependencies can be daunting for new developers. Managing permissions, access control, and code ownership can also become more complex than in a polyrepo setup. Furthermore, the initial setup and tooling investment can be substantial. Without proper tools, managing scripts, ensuring consistent environments, and maintaining fast feedback loops in a monorepo can quickly lead to frustration and negate many of its potential benefits. These challenges highlight the critical need for advanced monorepo management solutions.