Well you could do that today if you as a programmer could manually tell the system "please load addr x, y and z into the cache".
But if the cores of the CPU starts to communicate with the actor model then you wouldn't be using the memory close to the cores as a cache but as a storage area for messages that haven't been sent/processed yet as well as possible for thread local storage.
But if the cores of the CPU starts to communicate with the actor model then you wouldn't be using the memory close to the cores as a cache but as a storage area for messages that haven't been sent/processed yet as well as possible for thread local storage.