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by numpad0 220 days ago
USB-C can't readily carry everything. There are specific and expensive electronic switch things on host side that has to be handled with gloves by experienced mixed signal experts. It's standardized and allowed, but you're on your own in terms of making it work.

Getting HID through HDMI is nothing compared to that. Just Arduino level stuff. It only has to be standardized for interoperability. Car brands that seek to disinfect cars of Apple/Google disease will benefit a lot from that.