`impl Trait` syntax has been used casually in conversation on irc://irc.mozilla.org/#rust since long before Rust 1.0, and some at least of us had hoped to have it before Rust 1.0. It took a while, but we finally got it, so now we’re fairly happy. (I think the turbofish issue hadn’t occurred to those of us that casually wrote it before, but once it was being implemented it became obvious.)
I know. I was there. ;-) What I meant was that `impl Trait` hasn't existed yet on Rust stable, and it gives folks legitimately new powers, so it seems like it was on the line between it being a refinement and it being a legitimately new language feature. But this is splitting hairs; the classification doesn't matter much.
