This is a good and necessary step in the right direction, but if I understand correctly interpreters can't share memory directly. So this will unblock some uses

This is a good and necessary step in the right direction, but if I understand correctly interpreters can't share memory directly. So this will unblock some uses cases for embedding Python and for replacing process-level parallelism, but it doesn't yet improve their existing threading model. Nice to know anyway, I'll keep an eye on how they progress.