If a library uses nightly, then you have to use nightly to use it.

At this point, the only major library that requires nightly is Rocket, and Actix-web has been rapidly ascendant due to (rumordly) being used in production by Microsoft, and working on stable.

The data, from last year’s survey, (which means even more stuff was nightly only, for example, the RLS) where you can choose multiple options https://blog.rust-lang.org/images/2017-09-05-Rust-2017-Surve...