Which is exactly what you're doing, pulling the truck stop counter discussion.
I put the conditions that I went through that night in and took pains to spell out how that hit all cleared up and was well behind me, in order to make the point that stuff can happen that you shouldn't have a reason to expect.
Go back and reread the original post. Notice I said there had been zero indication of ice for an hour and a half on the vegetation. What is unsaid there is that the road has been clear and only wet for significantly longer than that. I have been out of the truck less than a half hour before this happened, and as anybody experienced does, I had walked around to check conditions of the pavement. I was also southbound into a pretty substantial Rising temperature gradient. The icing that I had spent the night in had spread rapidly East in slowly South, which I have been monitoring all night on the weather radio.
The point of that whole paragraph above? I was anything but complacent, so if you would kindly quit driving from the lunch counter and accept that it was, as noted in the title, an unexpected event, we would all be better off.
There was some driver error involved in this situation, but it dates back many months before it happened. You know what that mistake was? The mistake was putting a fairly cheap cap on my casings. The steer in the drive were virgin Michelin, and neither one of those gave any indication of losing traction before the trailer stepped out.