Re: They kinda do and kinda don't
Cruise control? No thanks. I trust my foot on the accelerator. Up to the maximum reasonable per day - 8 hours.
If your foot can do it, so can cruise control. You trust your foot because, like most people, you believe you are an above average driver.
An example where the car uses its sensors to get an accurate measurement of the speed of the vehicle cutting in and the angle it is coming in from can calculate the exact amount you need to slow down to remain safe. It can then act on this data faster than you can think "shit that bellend is cutting me up."