People get attached to things they've been using for decades. Also most of the world is still written in c/c++ so any critical mass has quite a lot to go up against.
Rust isn't perfect but it solves a lot of the pitfalls of C++ (not just UB, package management, horrible cmake files, linker errors etc.)
Rust isn't perfect but it solves a lot of the pitfalls of C++ (not just UB, package management, horrible cmake files, linker errors etc.)