There is lots of talk that Tesla's autonomous system is their ace in the hole, that no other manufacturer can compete. It doesn't seem that is true at all. GM's supercruise takes the win.
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Even after two years, Cadillac’s Super Cruise remained our top-rated system because, when turned on, it uses direct driver monitoring to warn drivers that appear to have stopped paying attention to the road. General Motors told CR that Super Cruise will be on 22 GM vehicles by 2023. Of the other systems we tested, we saw minor improvements in lane keeping performance for the Tesla and Volvo. Systems that didn’t give clear warnings to the driver to pay attention, such as Volvo's, or that failed to keep the vehicle within its lane, even on fairly straight roads, such as systems from Buick, Mazda, and Land Rover, didn’t fare well in our overall scoring. When CR requested comment from these companies, several said their lane keeping assist systems were not designed to keep the vehicles centered. (See rankings below.)
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https://www.consumerreports.org/car-...tance-systems/
Tesla still ranks highest on capabilities and performance, but only by one point. It falls behind on monitoring the driver for awareness.