If all the cars on the road were using them and had proper space between each car and it was very controlled I would use it so I could nap getting from point A to point B. Lol. Short of that I’m wary of giving up control, because you need to be vigilant when driving anyway.
I don’t use cruise control much, because it can’t predict hills and turns. In FL we don’t have many hills and turns, but where there is a lot of traffic I’m still reluctant, because crowded highways we also need to slow and accelerate constantly.
My husband uses cruise control quite a bit, and I hate it, because he doesn’t like to interrupt it, so he often gets too close to cars. By contrast, when he drives with his actual foot he doesn’t do that, he lifts if he is getting close to a car.
I think it would be great if all cars ditched old fashioned cruise control and incorporated automatically slowing down when close to a car.
Where I live now some people use their cruise control because it’s hard to keep such a constant slow speed. Many roads are 35 mph with plenty of cops giving out tickets. we also sometimes share the road with golf carts, so a car that can detect golf carts and motor cycles could help avoid some very deadly accidents.