Most languages with proper multithreading that I've used don't have an ownership model. Most the the standard library collection types are explicitly not thread

Most languages with proper multithreading that I've used don't have an ownership model. Most the the standard library collection types are explicitly not thread safe, and then there's separate concurrent versions for if you're writing multithreaded code. And you're given locking/mutex primitives if you want to roll your own stuff.