[zozbot234]

> You have to obsess over who owns what.

Most of the time you can also avoid this by just copying data using .clone(). This adds a tiny bit of overhead, which is why it isn't a default - but it'll still be comparatively very efficient.

Similarly, there are facilities for shared mutation (Cell/RefCell) and for multiple owners extending the lifetime of a single piece of data (Rc/Arc). It's not that hard to assess where those might be needed, even in larger programs.

[abiro]

This big time. Rust has comparable ergonomics to high level languages once you stop trying to optimize everything and start throwing around clones liberally. And the nice thing is that if you do need to optimize something later you can trust the compiler that if it compiles, then it’s correct (barring interior mutability/unsafe).