[axaxs]

I'd consider that low visibility, not 0. But still a good use case. I'm in an area where the weather this year has been unreal. Twice I left my house, to have every window in my car fog to 0 visibility. You feel lost, you panic, you slam the brakes. Only then do you roll the windows down and slowly make your way to the side to defrost. Also note, both times I was in a hurry and it was completely my fault. Still, it was the first time I realized what 0 visibility was.