I know C and C++ are two fast, efficient, and mature computer languages that can be used to create operating systems, applications, and games. Are Go and Rust, two fast and efficient computer languages, that are also less mature than C and C++, good, if not better, alternatives, when it comes to speed and efficiency, for programming operating systems, applications, and games? I also know C++, Go, and Rust are considered modern computer languages, while C is not.