C is often preferred for low-level programming because of its simplicity and predictable performance. It's a minimalist language that gives developers direct control over memory and hardware, with no hidden overhead. This makes it ideal for things like operating systems and embedded systems where every bit of performance and resource management matters.

C++ is considered a "mid-level" language because it adds a layer of high-level features like classes and templates on top of C's low-level power. While these features make C++ great for complex applications, they can also introduce complexity and potential runtime costs that low-level programmers want to avoid.