Now what you could do is break objects down into annotated types. Consider immutable vs. mutable in combination with thread-unsafe, thread-compatible, and thread-safe. Immutable data that's not thread-unsafe you can share freely across threads, all is well. L2/L3 caches are happy. Mutable that's thread-safe can similarly be shared at will. Then you can force that thread-compatible objects be wrapped & accessed only from a Mutex or transfered between threads as part of a move operation.

Rust gives you the tools to do all of this, and indeed does some of it, but as part of the steep learning curve of the ownership model.