Will the Liskov substitution principle be implemented in current software architectures?

The Liskov Substitution Principle (LSP) states that objects of a subclass should be interchangeable with objects of the superclass without violating the correctness of the program. In modern software architectures, such as microservices, layered architecture, DDD, and also when using SOLID principles, LSP is implemented and maintained, but with certain complexities.

Main points:

• In object-oriented systems with clearly defined interfaces and contracts, LSP is easier to adhere to.
• In microservice architectures, where services interact through APIs, LSP manifests in interface and behavior compatibility.
• Violations of LSP often occur due to changes in preconditions, postconditions, or invariants in subclasses.

Thus, the Liskov Substitution Principle is feasible in modern architectures, but requires discipline in design, careful definition of contracts, and testing, especially when expanding functionality and inheritance.