Ownership is (at least) two things: who has the responsibility for destroying an object when it's finished with, which GC takes care of, and who has the right t

Ownership is (at least) two things: who has the responsibility for destroying an object when it's finished with, which GC takes care of, and who has the right to mutate an object while it's alive, which GC doesn't. I mostly write Java for a living, have done for a decade, and still occasionally trip myself up by mutating an object I'd forgotten I've shared.