Like most engineers/geeks/hackers, you've completely missed the point of the Nest. The point is: people like to adjust their thermostat. They're too hot? The

Like most engineers/geeks/hackers, you've completely missed the point of the Nest. The point is: people like to adjust their thermostat. They're too hot? They want to cool it down. Too cold? Turn it up. The Nest allows one to perform those actions while retaining some level of efficiency, and additionally attempts remaining possible optimizations (e.g. turning the A/C down while you're not at home). The Nest is not about ideal efficiency -- it's about a system that works with the way people already behave.