We have two new Hyunadai's. My experience is mixed. For one, I get the "consider taking a break" warning constantly - possibly my sleepy eyes? In the Sante Fe, the cruise control disengages constantly b/c it can't see my face when I drive with left hand (my default) - this does not happen in our Ioniq though. Rear view camera + warning has been helpful on one occasion, but both rear and side cameras have fully disengaged my ability to drive many (30+) times when it was safe to do so. Basically in a city where you need to pull out and weave into traffic, if you begin moving too early it'll stop the car and also prevent the gas pedal from working (even if you let off and press many times). My most favorite is it would do this in my kids school drop off (cars are close and all moving at 5mph). The traffic helper knew this would happen to me and we had many laughs about it, after the first few times of them waving me a bit aggressively (why aren't you moving yet?). "Did you forget something in backseat" alarm goes off every time I park, I suppose from kid's car seats. Lane assist is nice when helpful, but very annoying when not (~10% helpful, 90% FP). My general read on the lane assist warning is its simply too sensitive. I disable the lane assist on cruise control, otherwise the adaptive cruise control is 90% good (it only can't seem to figure out to speed up when passing a semi, and will slow down instead).
Very generally speaking, if I could disable all of the safety features I definitely would, they are almost exclusively false positives in my case and occur every time I drive. Yet its only two specific ones that are genuinely a nuisance (rather than annoying): The face detection on cruise control, and the car-disabling when I'm pulling out (which at times is out right dangerous).