Decoupling: Reduces dependencies between classes → easier to change or replace components.

Testability: Enables mocking dependencies → simpler and faster unit testing.

Maintainability: Centralized control of dependencies → clearer, cleaner codebase.

Reusability: Components don’t depend on specific implementations → more reusable logic.

Scalability: Makes adding features or new services smoother → less code breakage.

Flexibility: Swap implementations at runtime or via configuration (e.g., local vs. cloud storage).

Consistency: Manages shared resources (e.g., singletons) cleanly and predictably.