In which cases is it not recommended to use inheritance in object-oriented programming?

Inheritance in OOP is not recommended to be used in the following cases:

• When classes do not have a clear 'is-a' hierarchy. If the relationship between classes does not conform to the Liskov Substitution Principle, inheritance can lead to incorrect behavior.
• If flexibility in changing behavior is required — it is better to use composition to change components at runtime.
• When inheritance leads to tight coupling and complicates maintenance and extension of the code.
• If a subclass needs to modify or override a large number of base class methods, which indicates poor design.

For example, instead of creating a subclass for each behavior variant, it is better to use interfaces and delegation, which will improve modularity and testability.