The only way this feels like an improvement over Axum (a library this is built on) is a tiny syntactical change in how one hooks up a route handler function to a route.
Otherwise, it feels like it adds nothing on top of Axum. In fact, I don't see a way to do statically typed query param extraction with this, so I'm not even sure if the tiny syntactical change is worth it.
Am I missing something?