Coefficient of performance (i.e. energy efficiency) at decent delta-T is always the most important factor and rarely mentioned.

Modern cooling equipment generally has the largest environmental impact from energy consumption, not manufacturing or refrigerant leakage.

Especially with ultra-low-GWP propane or butane refrigerant, though that’s not usually used in large-scale systems.

That is the source I was trying to remember.

It’s a survey. The same 3% of people that will answer that the moon is made of cheese.

There’s also probably a handful that are doing better personally out of sheer chance, or misread the question.