Matt Godbolt sold me on Rust by showing me C++

The one thing that sold me on Rust (going from C++) was that there is a single way errors are propagated: the Result type. No need to bother with exceptions, functions returning bool, functions returning 0 on success, functions returning 0 on error, functions returning -1 on error, functions returning negative errno on error, functions taking optional pointer to bool to indicate error (optionally), functions taking reference to std::error_code to set an error (and having an overload with the same name that throws an exception on error if you forget to pass the std::error_code)...I understand there's 30 years of history, but it still is annoying, that even the standard library is not consistent (or striving for consistency).

Then you top it on with `?` shortcut and the functional interface of Result and suddenly error handling becomes fun and easy to deal with, rather than just "return false" with a "TODO: figure out error handling".

I like so much about Rust.

But I hear compiling is too slow.

Is it a serious problem in practice?

I can't speak for a bigger rust project, but my experience with C++ (mostly with cmake) is so awful that I don't think it can get any worse.

Like with any bigger C++ project there's like 3 build tools, two different packaging systems and likely one or even multiple code generators.

that does not answer at all OP's question.