Also, the use-cases you cite are on point. They may not be designed to handle them, I’d turn them off for everything other than freeway use. One system may try to accommodate for things like pedestrians or oncoming traffic, another may only be looking at the road and try to dictate being in the middle of a lane. ...again, no standards.
The adaptive cruise control works fine for most cases, though. The same with the range estimator (it's an EV) as long as my driving habits haven't changed. When I go on a trip, though, it takes about 200 miles or so before it figures out that 80 mph driving (read: lower range) is the new normal. After the first 200 or so miles the range estimate is pretty accurate. The same for when I'm done with the trip and resume local driving (the range estimate assumes a low range until it has time to realize that 55 mph is the norm with only a few miles here and there of 75 mph).