[pcwalton]

We can't force people to use the stable version of Rust. But it does exist. And we're working on bringing the most popular nightly features to stable as soon as possible.

In any case, even if you're using nightly your code won't break nearly as much as it did pre-1.0. We use nightly in Servo and we've been through dozens of Rust upgrades that sailed through without a hitch--and we have 150+ dependencies.

[M2Ys4U]

Oh absolutely - people are inevitably going to want to play with the new shiny (for various reasons, improved functionality and novelty being the two biggest), and Rust is still relatively young so the crate ecosystem is, while not small, not yet comprehensive.

This means that while Rust-the-language is stable, the ecosystem around it isn't quite yet. That's perfectly fine and it's nobody's fault, least of all the people developing the language. But it is one of the barriers to me picking it up right now, though.