There is however a downside to the „clone everything“ approach: The performance might get worse than what it would be in an optimized GCed language that doesn’t

There is however a downside to the „clone everything“ approach: The performance might get worse than what it would be in an optimized GCed language that doesn’t require cloning (eg C#/Java). At least I would only reach out for Rust at the moment for performance critical code, and then don’t leave easy optimizations on the table due to lifetimes.