Dependency versioning is much smoother. Example: Service A requires version 1.1 of libFoo and libFoo 1.1 requires version 0.1 of libBar. But Service A also dir

Dependency versioning is much smoother. Example: Service A requires version 1.1 of libFoo and libFoo 1.1 requires version 0.1 of libBar. But Service A also directly uses libBar version 0.2. Now you have a conflict. If libFoo and libBar are internal code stored in a monorepo they're automatically version-compatible because there is only one version of both.