I wonder why they don't use propane powered refrigerators. They use very little propane and a single 20 lb tank would last much longer than 35 days. I'm guessing it would be smaller and lighter than these too.
Propane refrigerators are an option and are found fairly frequently in environments where a consistent and uninterrupted electricity supply is difficult to maintain, particularly in RVs and boats, also in remote cabins.
Electrically powered refrigerators are generally more powerful, however, and if you can use some of the cooling capacity to create a thermal storage (or sink) mass in the form of ice to survive power interruptions, that might prove more useful.
Clickbait headline definitely overstates the case. Site should be penalized for that.
It doesn't seem like portability was a major concern. Hopefully if this catches on, other improvements in size, weight and purposes will come about. This one seems to be for a very specific purpose.
I think you are imagining it being used differently than what they have in mind