You can write your own code in stable Rust while using tooling that works on nightly. Rustup.rs makes it very easy to switch between stable and nightly.
Fortunately for Rust that's not an issue since you don't need any special privileges to install it; hell, it doesn't even have to be installed. As long as you point your $PATH to Rust's bin directory you can use it, as far as I know.
If you work for a company that does not let you choose your compiler then I guess they probably will be stuck with a language more mainstream anyway. I doubt that the nightly compiler will be the dealbreaker.
On this companies using less mainstream languages like Swift, Go, F#, Haskell, OCaml isn't an issue because the communities don't depend on having nightlies installed.
