The post discusses the concept of polymorphism in C by comparing code design strategies used in Linux and FFmpeg. It emphasizes how polymorphism can enhance code reusability and adaptability. The user comments brought up a comparison between polymorphism in Go and Java, debating the effectiveness of interfaces and abstractions in each language. The main takeaway is that while C has its limitations, programming languages like Go offer more flexibility with their interface types, as they are decoupled from specific implementations. This reveals a shift in programming paradigms where newer languages simplify the implementation of polymorphism for better maintainability and clarity in code.