I have not been in a commercial house since I was in high school - and am making assumptions about why various commercial houses use what they use.
In a commercial laying house, birds are confined to small pens (IIRC, 5 birds to a pen). Given that the houses in the 80's had 100k+ birds per house, they were amazingly automated. I don't know why the automatic cups were used. I am sure the fact that the birds were caged was a factor. The water's might have been protected by the caging. Likewise the birds needed to be protected against failed waterers (99% working would not help if the ones to a specific cage failed - and there were at least 20k cages per house).
Meat birds had different consideration - they were not raised caged. The houses I worked around held less than 20k birds. They would have had hundreds of nipples. If one failed, there would have always been more available. Finding and replacing a failed nipple would not be a life or death matter.
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I currently have 4 nipples in my run, and 4 per layer in my brooder. I have used conventional (inverted jar/bucket) waterers. They needed filling daily, water got knocked everywhere, and poop was in it. I really like how clean and dry the nipples keep things. An added bonus is I only have to fill the 5 gallon bucket weekly.
As for climate - South Texas here. Heat will be an issue, but not ice. Brother-in-law is in Maryland. His waterers were freezing at night.