I wrote a relatively simple web application (https://github.com/DSpeckhals/bible.rs) about 9 months ago with version 0.7. The initial code changes to migrate to 1.0 weren't that bad (https://github.com/DSpeckhals/bible.rs/commit/fbd7e8207023a0...). The most substantial changes I made during the migration weren't necessary, but according to the author, are a little more idiomatic actix-web: moving from sync arbiter actors for Diesel connections to just using `web::block`. Both use a threadpool behind the scenes, but `web::block` is less verbose.

I've been extremely satisfied with its performance and ergonomic abstractions over HTTP and async Rust that actix-web offers. And like others have mentioned, the author and other contributors provided me with some good, practical answers to a few questions I had.