For what its worth I think different manufacturers systems behave differently.
I once rented a Cx9 for a couple hour trip, and the ACC was a pain in the ass.
But, I had it on my last truck, a 2021 Ram 1500 Limited and it was fantastic. I got onto highways, hit the button and forgot about my speed. It was that good. My current vehicle a BMW x5 doesn't have it, and I miss it very much.
So much so, that the Denali I have on order has it optioned.... but who knows if it will actually show up with it or not. But, its a must have for me.
Different strokes/different folks