Your understanding is correct. You can use all the cores but it's much slower per thread and existing libraries may need to be reworked. I tried it with PyTor

Your understanding is correct. You can use all the cores but it's much slower per thread and existing libraries may need to be reworked. I tried it with PyTorch, it used 10x more CPU to do half the work. I expect these issues to improve, still great to see after 20 years wishing for it.