Regarding AC

Well, not unheard of, but the way you over there use it is. Slight correction - yes. Turning it full on to have temperature 10 Celsius degrees lower than on the outside - no.

I said half of the world, which is completely accurate. It is completely unheard of for a huge swath of humanity. The energy costs are INSANE to run a heat pump in 2026 prices outside of the wealthy elite globally. Let’s arbitrarily say top 10% or so of earners, which is something between 35k and 47k… hardly a princely sum in the US, given that the US median is something like 62k.

There are places in latin america that have air conditioning, obviously. It’s exceptionally uncommon based on my firsthand experience though outside of tourist areas like hotels and high end restaurants. There are wealthy areas in nearly every country on earth that are exceptions to the rule.