Full time fifth wheel Insulation confusion

Teton only had 1.5" of insulation. Never heard anybody say anything about the trailers not performing in extreme temps. NUWA didn't have thick walls but still performed well. Arctic Fox has 2" walls but the foam is a heavier and more dense variety. Not as dense as the blue or what Alpenlite used but more dense than anybody else as far as I can find currently in production(not counting the customs). Not sure of the foam used in Luxe Gold yet. Seals around the slides are just as important. Again, Alpenlite and Teton used very thick and wide seals that would not allow any drafts. Arctic Fox at least uses better seals than anyone else out there. They are twice as thick as the run of the mill seals used on everything, including DRV. I have seen a few NUWA Champaigns with the thick seals. Don't know if that was an option or folks did it aftermarket. With all that said the best full time coaches I have been in are still the wood framed trailers...Excell, Travel Supreme, etc. People tend to get caught up in inflated R values. My Newmar is only supposed to have R9 sidewalls but it is and was better than the DRV Select Suites I had for a while. Huge difference especially in windy weather. The Newmar is not as tight as the Alpenlite was but the Arctic Fox is better than the Newmar and Select Suites but not as not as good as the Alpenlite. These are the only four I have owned to compare.