I keep hearing the tooling argument in discussions about monorepos, and I'm not entirely sure what is missing in this area when compared to projects with multiple repositories.

Tools like Pants[1] or Lerna[2] solve a lot of the issues related to builds and dependency management.

What exactly are you missing _today_ that prevents your organization from adopting a monorepo approach?

[1]: https://www.pantsbuild.org/

[2]: https://lernajs.io/