My dumb thermostat also accounts for outdoor weather and sun exposure, simply by directly measuring the indoor air temperature which changes in response to those things. Dumb ones can also have schedule programming too. There's been plenty of times running errands when I approach home and then pass it up. Usually better to keep your temp constant than go through heating/cooling/big delta cycles generally speaking anyhow. One of those things where it feels like it makes sense but probably doesn't if you are coming back that day anyhow.