I have nothing automated in my life, that I know of? I don't have a garage; the door to the house has a key; the lights I turn on with a switch; no Alexa, don't use Siri... I am not exactly opposed to automation, but I am hesitant to share even more demographic data to cloud services.
that said, useful in this case means saving a bit of money by adjusting its settings. a manual (non cloud) thermostat would work too.