The only experience I have with automatic emergency braking was with a large box truck several years ago. It was quite horrible, false positives often, and never was necessary. Once it braked for no apparent reason while going downhill around a turn and almost caused us to wreck since the truck didn't turn as well under heavy braking. I hope better implementations exist.
Yeah this technology ain't mature in any way, 99% or 99,9% is simply not good enough to deploy anywhere en masse. Lane assists, braking, collision recognition - I've seen false positives, I've seen no reaction where there should be one. By far the safest driving for me is simply having experience and no assistants enabled, ever. I know this begs question how to get to that level, these flawed helpers can maybe statis…
A driver glance down to change the station, going 110 kms, with less than 15 meters and the car in front of you full stop breaks, you are going to crash, but yet folks still continue to do it and still they believe they'd be able to stop in time even with all the experience of driving.
I don't believe most drivers today would be able to pass the present driver test successfully the first time due to formed bad habits.