Anyone know why the super simple Middleware trait[1] was replaced by the more complex (and confusing at first) Transform and Service traits? Here's the simple

Anyone know why the super simple Middleware trait[1] was replaced by the more complex (and confusing at first) Transform and Service traits? Here's the simple middleware examples: 0.7: https://github.com/actix/examples/blob/0.7/middleware/src/simple.rs https://github.com/actix/examples/blob/0.7/middleware/src/si... 1.0: https://github.com/actix/examples/blob/master/middleware/src/simple.rs https://github.com/actix/examples/blob/master/middleware/src... Could a simple Middleware trait be added that would implement both new traits for us? [1]: actix_web::middleware::Middleware