I wrote a program yesterday in 1.25 which did some simple file I/O right there in main, didn't need to be fancy at all... and then this morning I come online and find that we now have fs::read_to_string and main can return a Result... great!

But I needed this yesterday!

Seriously though, this is an amazing release and so much stuff in here I've been looking forward to for ages. impl Trait is going to change the way I write Rust.