A lot of people using C++ don't actually use any libraries. I've observed the opposite with Rust.
People choose C++ because it's a flexible language that lets you do whatever you want. Meanwhile Rust is a constrained and opinionated thing that only works if you do things "the right way".
> People choose C++ because it's a flexible language that lets you do whatever you want.
You went on a bit too long. C++ lets you do whatever. Whether you wanted that is not its concern. That's handily illustrated in Matt Godbolt's talk - you provided a floating point value but that's inappropriate? Whatever. Negative values for unsigned? Whatever.
This has terrible ergonomics and the consequences were entirely predictable.
People choose C++ because it's a flexible language that lets you do whatever you want. Meanwhile Rust is a constrained and opinionated thing that only works if you do things "the right way".