Actually it is possible to make C++ compile faster than Rust, because the ecosystem is more friendly towards binary libraries, then besides incremental compilation, you can also get incremental linking.

Additionally there are ways to have interactive code reloading, e.g. Visual Studio and Live++.

Or even a proper REPL, ROOT, CINT, Xeus.

Naturally all things that Rust could also have, only it hasn't been the focus and there are several decades to catch up.