> it’s probably not a library with a 100 function API that only obfuscates a few standard data structures and custom types that are locked away in the implementation for little benefit.

Thanks for expressing this - I think this is a fantastic insight. I love C as a language, and I've been really enjoying Rust lately too. Both languages make it easy to design around simple, raw structs. And a simple struct with 3 public fields is often a much easier interface to work with than 100 getter & setter methods hiding the same struct which has private fields.