I now have a car with that system after having an old dumb car for the preceding 20+ yrs of driving, and I keep it off by default, and turn it on only when I know I’ll be slightly distracted for a few minutes.

It was just too difficult to get used to, and frankly it was so sensitive to where it was that just being near the edge of the road, where I like to ride to give other drivers as much space as possible because I don't trust them, set it off and it fought against me constantly, causing far more swerving than I’d otherwise do.. it’s also a giant asshole about country driving, where lane markers only apply when theres other cars around.

I could see it being useful for new drivers who never had to learn to do fully manual driving, though, the same way power steering was a useful change that was difficult to adjust to for those who learned without it.