It's directly responsible for Rust needing the "turbofish" syntax to pin down generic return types as in

let foo.iter().map(|x| x*2).collect::<Vec<_>>()

If they'd used something like [T] for generics, then there'd be no collision with the < and > operators needing disambiguation in some contexts.

They even have a Book of Mozilla-esque entry in their test suite named "Bastion of the Turbofish" to pin down an example of the problem case, complete with

https://github.com/rust-lang/rust/blob/43192ca3d72ed0ca42ba9...