They're supposed to be opposed. "Communicate by sharing" vs "share by communicating". Communicating has nicer ownership rules, but not all runtimes make it easy

They're supposed to be opposed. "Communicate by sharing" vs "share by communicating". Communicating has nicer ownership rules, but not all runtimes make it easy to e.g. communicate raw video frames to a compositor But yeah in the end it's all Turing machines and you can emulate anything with anything else