I've only seen it start to frost or get cloudy around the edges on very old automobiles. I have a 32 year old boat and its tempered glass windscreen is of good quality and all clear.
Have 110 year old glass in my home, you can tell its old, its got all kinds of little imperfections in it, still clear. Plate glass.
I think the stuff that gets cloudy is laminated.
The boat mentioned "certainly does look appealing".
