I think that's a good thing. People do complain about the overly high rate of evolution of Rust, but I think that was much more true in previous years than toda

I think that's a good thing. People do complain about the overly high rate of evolution of Rust, but I think that was much more true in previous years than today (not least because a lot of projects needed to depend on nightly). Also, most of these changes enable new things, and are only in the edition because of some low chance of breaking existing code. The 2018 edition had some major changes, so 2018 code looks pretty different - the ? operator, big changes to module use, impl/dyn Trait, and more. I suspect that most code bases you won't be able to tell whether it's 2018 or 2021 without looking more closely.