I’m away on vacation and weather reports say there might be a thunderstorm at my house with high probability of power outage, so maybe I lower the temperature setting to try and extend the life of the contents.

Kids/nanny/housekeeper changes the temperature against my wishes.

I’ve left the house for a long vacation with the fridge emptied and I’d like to change the temperature to consume less power while I’m gone, forgot to do it before I left.

And again it’s trivially simple functionality that costs almost no money or development effort to I implement.

> so maybe I lower the temperature setting to try and extend the life of the contents.

Bullshit. The ideal refrigerator temperature is already close enough to freezing that any small adjustment you could make is unlikely to do any good. If this was actually a good idea then by your logic (similar to odd love for printer manufacturers) the all wise manufacturers would have already incorporated this into their “smart” fridges.