I created my own web framework (<https://docs.rs/under/latest/under/>) to address some of my own perceived issues with a lot of current rust web frameworks - typing issues being one of them. Personally, I don't like the idea of endpoints requiring `#[handler]` or other "magic" derives, or guards - I wanted something with an endpoint that takes a request, and returns a result with a response. I'm still working on it, though.