Comment by zozbot234

> in a Java API you don't commit (at the language level) to the ownership of passed-in or returned mutable objects. In Rust, you do[.]

That's only the default, of course. Rc is commonly used in Rust to decouple ownership management from the simple use or passing of objects throughout the program, much like in any GC language. (Of course Rc on its own does not collect reference cycles; thus, "proper" tracing GC is now becoming available, with projects like Samsara https://redvice.org/2023/samsara-garbage-collector/ that try to leverage Rc for the most part, while efficiently tracing possibly-cyclical references.)