I disagree that using rust means trading a lot of developer time. I'm as comfortable with rust as I am go, and I develop equally fast in either language. I would even say faster in Rust because of the type system.
That's quite a feat. According to the Rust developer survey, it takes many people a month or more to feel productive in Rust^1 at all much less as productive as with Go. I've been picking up Rust occassionally for 4-5 years now and I'm still not particularly productive and far less productive than I am in Go (and I come from a C++ background, so it's not like I'm a stranger to thinking about memory management and things). I suspect that you're an outlier (I may be also, but my point doesn't hinge on that).
^1: Most people report being productive with Go in a day or two
Well it took me longer to get comfortable with Rust than Go, and I also had to learn actix (actor style framework in rust) to do the same high concurrency programming. But once the time investment is put in, I definitely consider Rust to be the more productive language.
Once async/await stabilizes and the rest of the ecosystem catches up and becomes a little bit more ergonomic to use, I would say Rust will be in a good position.
