The other benefit is that almost all of the Rust ecosystem supports serde, often by way of a feature. So using serde can mean being able to embed a type from a

The other benefit is that almost all of the Rust ecosystem supports serde, often by way of a feature. So using serde can mean being able to embed a type from a crate in your serializable type or being able to pass your own types to crate functions/methods that serialize/deserialize. It all ends up being interoperable.