Indeed. And the reason they use multiprocessing is bc they have learned that Python's multithreading is not a good option in cpu bound tasks. The blessing in disguise of course being that multiprocessing is also a shared nothing model, so (mostly) lock free programming is the default. Oth if you have a need for concurrently accessed shared memory/resources and need locks, it comes with an explicit cost. I think that's a good thing.

In the future the default concurrency model will be shared everything free threading, and all hell might break loose. Hopefully not.