A Nest E thermostat and a video doorbell came with the house.
Already replaced the doorbell with a Eufy, but I'll ride the thermostat into the ground, which might be around 6 years at this rate.
Another hurdle is that the Nest thermostat is tied into the local electricity co-op's peak-time usage reduction rebate program. They currently only support by Google (Nest), ecobee, Amazon, and Honeywell.