1.0 only means "code that you've written against a stable release won't break on future stable releases". Rust will still be evolving quickly for quite a while, though we'll at least be free of this nonstop update-your-broken-code treadmill that we've been on for years. :)
Re:Rust 1.0: Scheduling the trains
by arthursilva on Friday December 12, 2014 @11:18AM
(#8740881)
Something in the middle, check this post http://blog.rust-lang.org/2014/10/30/Stability.html
My question sounds obvious but depending on the project 1.0 can mean very different things.