Last year, we shipped Rust 2021 and I have found the changes to be a real improvement in usability. Even though the actual changes themselves were quite modest, the combination of precise capture closure and simpler formatting strings (println!("{x:?}") instead of println!("{:?}", x)) is making a real difference in my “day to day” life.1 Just like NLL and the new module system from Rust 2018, I’ve quickly adapted to these new conventions. When I go back to older code, with its clunky bo...
