Rust's integer types are poorly abstracted. The use of specifically sized types for quantities that are not related to hardware is comically ridiculous.

In the C world, only the goofballs do things like use char or int8_t for the number of children in a family, or wheels on a car.

yet that is what Rust code looks like. Almost every Rust code sample I've ever seen sets off my bozon detector just for this reason.