My car (2014) has seven or so different CAN busses, with a gateway in between. Whether that constitutes a different "network" or not can be argued, but at least

My car (2014) has seven or so different CAN busses, with a gateway in between. Whether that constitutes a different "network" or not can be argued, but at least something that brings the entertainment CAN bus down, be it just by e.g. shorting it, won't (easily) bring down the other busses.