That's true, a lot of Rust's features do exist in C++. I guess the main difference is that Rust is safe by default and you have to go out of your way to be unsa

That's true, a lot of Rust's features do exist in C++. I guess the main difference is that Rust is safe by default and you have to go out of your way to be unsafe. C++ is basically unsafe by default. In C++, the standard syntax for allocating memory gives you a completely unchecked pointer that you can freely use from whatever thread you want.