It's all good now! Rust has been stable with backwards-compatibility guarantees since 1.0 was released two years ago.
It's true that some cases still use nightly, as some people want to opt into cutting-edge stuff. But it's much much less than it was a while back.
Now, I'm willing to use the bleeding edge, since I'm just just learning the language, but it still just bugs me in that way that code smells always do.