We have an i3 too. It has conventional cruise only though. Was yours an optional extra? What you describe doesn’t sound like adaptive cruise to me.
The EV6 allows you to use paddles to dial up more Regen as you approach a junction, from off all the way to full ‘one pedal’ that will bring you to a halt. Smooth, and rather satisfying to use. In adaptive cruise it will do pretty early anticipation of traffic ahead etc and stop the car nice and progressively if necessary, with Regen and conventional braking according to the degree of slowing needed. It won’t detect a red traffic light unless someone is stopped ahead though.
Oh no … that means that most of us will probably only be experiencing driverless cars thru the annoying/dangerous transition and integration stage, which could take a long time.
So, spending an hour on the back seat of the car with this week’s girlfriend is going to be confined to mum and dad’s driveway, rather than some quiet country lane …