Re: Not an "autopilot"
I find them useful within their limits. The problem, as I understand it, is that:
-The driver has to be of sufficient intelligence and aptitude to read up on them and use them appropriately and build up a feel for how the systems behave in different situations or when they fail. Nobody checks whether this is the case or not
-They differ by manufacturer and there are no standards enforced by the industry. e.g. Park Assist is different on every car
-You are dependent on the manufacturer explaining adequately how they function, the limitations and not just being a marketing bullet point
-They might change over time with software updates
-Have they been tested to destruction in all world markets the car is on sale in and do the characteristics vary by market, are these results publicly available?
By way of an example, if my Audi was in adaptive Cruise mode with lane keeping assist on, it might seem like it's operating autonomously but if it can't detect the lane markings for a few seconds (for several different reasons), it doesn't sound an audible alarm it just changes the lane marking on the cockpit/HUD from green to gray and you suddenly notice it drifting a little.