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I continue to be surprised by this despite logging some good number of Rust hours. Cargo run and it just works as expected even with complicated data sharing code etc.

Of course most of the work gets done by the compiler safe guarding and guiding during development. People make noise about lifetimes etc but once you are ready to pay the penalty of Arc (and in most cases if you are using lifetimes you are already on the verge of using Arc). Same with using cloning as needed. End of the day, these incur a predictable and acceptable performance penalty than many other languages do while providing good safety.