What we’re seeing in practice is not throwaway software but successful companies built over many years using e.g. Golang. When they grow big enough to pay the Rust tax and can’t squeeze more performance out of their set-up they switch to Rust.
Starting something in Rust only makes sense for very few domains and software categories.
I wonder how Go would fare if it had a production-ready LLVM/GCC backend. I wouldn't be surprised if much of the performance differences between Go and C/C++/Rust comes down to optimized codegen (rather than GC, which is what people often complain about Go). Not saying that GC pauses might not be an issue in some cases, but still...
Starting something in Rust only makes sense for very few domains and software categories.