Speaking of the four versions of tokio in your build problem: this is definitely an issue with Rust dependencies. Async just magnifies it because there are a lo

Speaking of the four versions of tokio in your build problem: this is definitely an issue with Rust dependencies. Async just magnifies it because there are a lot of async utility crates. Personally I hate dependencies in general and try to minimize them. Instead of reaching for a utility crate I think “how could I architect this so I don’t need this hack?” There is almost always a way. In the end falling back on Arc<> is still cleaner and probably comes with less overhead than dependency spaghetti.