What I really like about C is that it supports these sophisticated concepts without having explicit support for them. It just naturally emerges from the core concepts. This is what makes it feel like it just doesn't restrict the programmer much.

Maybe it's a bit due to its evolution. It started with a language that should have all features every possible, that was to complicated to be implemented at the time. Then it was dumbed down to a really simple language. And then it evolved along side a project adding the features, that are truly useful.