C's file handling stands out through memory mapping, allowing developers to treat files as memory blocks. Using mmap() and munmap(), programmers can open, modify, and close files with simple pointer operations. This approach eliminates the need for explicit read/write calls and manual serialization, making file operations as straightforward as working with arrays in memory.

Most modern programming languages treat files as secondary concerns, offering only basic read/write functions and serialization libraries. Developers must manually parse data, process it, and write it back to disk. This creates verbose code that's limited to sequential access patterns. Even when languages support memory mapping, it's typically restricted to byte arrays requiring additional parsing.

Memory mapping in C provides automatic caching and works seamlessly with files larger than available RAM. Data loads on demand, avoiding the memory constraints that plague traditional parsing approaches. While C's implementation has limitations like page fault overhead and no built-in endianness handling, it remains superior to alternatives that force developers into cumbersome serialization workflows. The approach proves especially valuable when dealing with large datasets where loading everything into memory isn't feasible.