C++ (Rust as well) is for high complexity problems that need high performance solutions. It's not just a few narrow application areas. For example, all major HT

C++ (Rust as well) is for high complexity problems that need high performance solutions. It's not just a few narrow application areas. For example, all major HTML and JS engines are also written in C++. I wouldn't call them (just) GUI applications. I bet that all offline renderers for professional CGI are also C++.