I wouldn't describe it as trivial. My Tesla would phantom brake consistently in a lot of spots - overpasses were a very big trigger.

Also anytime I'd pass an exit I wasn't taking in the right lane it would veer and slow down aggressively, same with trying to speed match a car rapidly accelerating on an on ramp.

Bottom line, there's absolutely nothing that isn't driver assist; everything requires a significant amount of vigilance when you aren't driving in a straight line, in the left lane, on an empty highway with no one entering and exiting.

Imagine a scenario: someone's on a bike, running down the street towards the pedestrian crossing. There's a vehicle (truck, bus...) on the left covering the view. The cyclist swiftly crosses the road, the car doesn't detect anything as there's nothing to detect (because of the truck/bus), bam!

Many drivers would see the cyclist before and be very careful when passing the other vehicle (although we don't predict correctly 100% of the time either). I haven't had a chance to test any self-driving system yet so I'm legitimately interested, do those systems reliably detect such things?

Not to mention people (esp. kids) racing through intersections on electric scooters, casually ignoring traffic rules...