I am not seeing the relation between cruise control and crashes in bad weather?
If I bought something that says it can drive itself, then I expect I do not need to pay attention to the road because it can drive itself. Just like if my friend can drive themselves and I am a passenger, I can trust them to handle paying attention to the road.
To go out of your way and call something "full" self driving only indicates that I should have zero qualms about trusting that I do not need to pay attention to the road.
I'm guessing the 'bad weather' comment is referring to the common belief[1], possibly exaggerated[2], that cruise control can be dangerous and cause crashes when the road is slippery. Not sure what's changed with newer traction control systems. I'd have to believe this has gotten even less likely but I don't know; my cars are too old to even have ABS.
One of the anecdotes in the Jalopnik article mentions that the vehicle is a Town Car, which is significant because those are rear wheel drive and handle very differently from most cars on the road in slick conditions. I would certainly expect more issues with older RWD cars and trucks because they tend to fishtail and spin if the rear wheels are given power without traction.
