Yep! Those differences are totally correct. There are tradeoffs in each approach. One of the benefits of the Rust approach is that you can have a different impl

Yep! Those differences are totally correct. There are tradeoffs in each approach. One of the benefits of the Rust approach is that you can have a different implementation for each type (polymorphism), which is a feature I needed last week in some Rust code I wrote. FWIW: I believe that the Rust folks want to allow support for calling the functions directly.