A huge payoff that Rust provides vs Ruby or JavaScript is when writing development tools. It saves so much time and trouble to install a binary than to try and get someone to download the right version of Ruby, gem install, etc. Rust, while having its tax, is really great about telling you why your code won't compile and keeping you from footgunning yourself.
Trying to get ack or ag working properly on Windows is a bit of a pain. Now there’s an equivalent in Rust, rg, and I can get something that’s mostly superior to these others with `cargo install rg`. (OK, so I had to have installed Rust first. But I had done that.)
You always have to install something or it must exist first. Node, FCC, clang, Ruby, Python... you just need to think of rustup as the the equivalent of getting you rust compiler environment setup.