Polymorphism supports maintainability by allowing changes in class implementations without changing the code that uses them.
Polymorphism allows developers to introduce new implementations or modify existing ones without altering the code that depends on them. This is particularly useful in large systems, where updating a single class can improve functionality across the board without extensive testing or rewriting of dependent code. For instance, adding a new `DiscountStrategy` implementation in an e-commerce platform can be done without modifying the checkout logic.
Additional Notes
How does polymorphism support code maintainability?