Right you are, of course. However, more and more thermostats are fancy and programmable and such. The one on my wall is currently failing, however, and likes to pretend it's been reset about once a week. This results in the AC not kicking in until it's about 85 degrees inside and, if JM hasn't noticed that it's getting warm before that point, constant running of the AC to get it back down during the hottest part of the day.

I end up having to re-program the thermostat just as often as she gets to experience its failings. Since it's time for an upgrade I figured I'd look for (what I consider) the next in the natural evolution of such devices.