The crucial difference isn't technology, as others have described Rust's technology is actually an option for C++ though NIH means the committee will prefer any

The crucial difference isn't technology, as others have described Rust's technology is actually an option for C++ though NIH means the committee will prefer anything else. The real difference is cultural. The difference in API shapes in their respective standard libraries is because of culture not technology. Easy to see example: In C++ the two fundamental sort functions are named sort and stable_sort. In Rust those same two sorts are named sort_unstable and sort, a subtle but crucial safer choice. Or compare C++ vector::pop_back against Rust Vec::pop