It's at least partly a matter of affordance. You could soft-deprecate .unwrap() and .expect() (emit warnings at compile time, it will be annoying but not fatal)

It's at least partly a matter of affordance. You could soft-deprecate .unwrap() and .expect() (emit warnings at compile time, it will be annoying but not fatal), and provide a new version of expect with a name that's more cumbersome to type (or_panic_with(...) isn't bad in that regard, but you could do even worse... or_panic_with_error_message(...) :-).