That might explain the shortage of Helium. Next question is why did it take so long and are the other manufacture going to jump on line? If they don't and the Atwood preforms as good as they say it will change the whole RV fridges industry. Time will tell.
I have been waiting for someone who actually has one- I'm not sure if they are "in the wild" yet.
As to helium vs hydrogen, it depends on the partial pressure of each, which from a few quick Googles is much higher than hydrogen, which would be a bad thing (the pressure in the unit is the sum of the pressures of all of the gases. Hydrogen has a very low pressure, so when the liquid ammonia spills in to the evaporator, which is filled with hydrogen, the pressure is low enough to boil the ammonia, removing heat)
It is all well and good to tout the non flammable characteristics of helium vs hydrogen, but the hydrogen is a factor in a very small percentage of refrigerator fires.
I also may be jaded, because Atwood had a refrigerator in the 80's, which didn't last long. Now at least they are buying them from Norcold, but still...
WOW! It's blue! What a unique selling point. Now, if no one can fix the problems with keeping the Norcold 1200's cold, why do we think the same technology with helium instead of hydrogen will be better? Less fires perhaps, but a cold refrigerator?? This I gotta' see. Call me in 5 years. I'll stick with the household KitchenAid until you PROVE these actually keep the ice cream hard under real world RV use.
Pigman & Piglady
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