Just FYI, not only My resilient Ecobee device can sustain ST or ecobee outages that last less than 24 hrs, but it can also ‘replay’ any failed commands in the next hour window following a short outage.
The failed commands are stored in a queue to be replayed later for more reliability… This is important if you’ve left home and want to make sure that your thermostat’s mode is really Away or to avoid waking up ‘cold’ in the middle of the night because there was a short ST or ecobee outage.
Regards.