Package-private visibility limits access within a package but can expose too much if packages are large.
Package-private visibility is useful for tightly collaborating classes within the same package. However, if a package contains many unrelated classes, this can expose more than intended, potentially leading to accidental misuse or dependencies. For example, in a large e-commerce application, keeping unrelated classes in the same package might inadvertently expose sensitive methods or data.
Additional Notes
What are the tradeoffs of using package-private visibility?