Yeah, sure, when you already know idiomatic Rust. The point is that many developers never even get close to understanding the borrow checker, let alone writing

Yeah, sure, when you already know idiomatic Rust. The point is that many developers never even get close to understanding the borrow checker, let alone writing honest-to-goodness idiomatic Rust. This can be improved by showing them the unidiomatic stuff that they can use to suspend or shift guarantees. Besides, unwrap() is also terrible in this regard but it's the single most used feature in tutorial code. You need to teach someone Rust before they can learn idiomatic Rust.