An article on Hacker News argues that C has evolved from a programming language into a protocol, creating complexities for other languages. The author contends that C's role as a *lingua franca* forces all other languages to interface with it, primarily through Foreign Function Interfaces (FFI). This design choice, while seemingly practical, introduces numerous challenges for developers.

One major issue is the difficulty of accurately parsing C headers. Because C lacks a formal standard, each compiler implements its own interpretation, making it hard to create a universal parser. Even Swift, which has strong interop capabilities, avoids parsing C headers. Developers must manually translate C types, which is cumbersome and error-prone, further complicating the process of FFI.

Furthermore, C's lack of a defined ABI (Application Binary Interface) poses another problem. The ABI determines how data types are laid out in memory and how functions are called. Since the ABI varies across different platforms and target triples, this lack of standardization creates a fragmented environment for developers dealing with C interfaces.

Ultimately, the article highlights the limitations of C as a unifying interface. It points out that the reliance on C for inter-language communication, while widespread, leads to a complex and often unpredictable development experience. This is especially true when integrating with operating systems and other libraries. The author's frustrations underscore the need for more standardized and reliable methods for language interoperability.