Sure, but this reason makes more sense if you use it more often. I can understand ppl wanting better quality consumer electronics or even a car as they'd experience the benefit every second they run it. They would most likely be using them almost every day as well.
Don't understand why you think summers are getting increasingly hot. As urban sprawl continues there is more heat trapped in the city, so you could expect a cpl of degrees more than out in the country.
But just look at
last month's weather, the first two weeks were very stuffy then it suddenly started raining and the remainder was quite pleasant.Then it warmed up and as you can see
this month it started raining again. I bet out of the two months you would need the AC for just 3 weeks. The wierder thing is the nights are much cooler outside than indoors.
Do you find this same kind of variation in other places i wonder.