[jjav]

> I am not gone on a predictable schedule, any pattern it picks up will be incorrect.

Very much this. Either the pattern is predictable which makes it easy to program into a simple thermostat or it is not in which it'll always be wrong in any "smart" thermostat.

Nest and similar are great case studies on the ills of overcomplicating something that should be super simple and reliable.

My mid-90s thermostat is much more reliable. I programmed my schedule into it decades ago and it does its thing with zero confusion ever since then. When I need to override it's just a button press and it automatically resets back to the schedule next cycle. Nothing to go wrong.