It could be, but it's often just that the things you got in the box were higher quality and so your results are higher quality by default. Better types like Ve

It could be, but it's often just that the things you got in the box were higher quality and so your results are higher quality by default. Better types like VecDeque<T>, better implementations of common ideas like sorting, even better fundamental concepts like providing the destructive move, or the owning Mutex by default. Even the unassuming growable array type, Rust's Vec<T>, is just plain better than C++ std::vector<T>. It's not a huge difference and for many applications it won't matter, but that's the sort of pervasive quality difference I'm talking about and so I can well believe that in practice this ends up showing through.