Yeah, no doubt Rust is one of the top languages out there. It is 30% faster than Go as tested on Benchmarks Game and has high scalability. If we are working on something that needs absolute speed and reliability, Rust might be a better choice. It seems that Dropbox and Discord add in Rust to optimize some parts of the service (sync engine for Dropbox/read state service for Discord) to improve the performance, latency, cloud resources, and user experience.

But if we considering talent supply (a company perspective), learning resources, and learning curve from a programmer perspective, Go or Flutter might be a better choice to start on. (in my opinion).