Realize the main point was the differing electric and gas costs, but the briefly mentioned behavior change can be a significant cost factor. We went through this with solar, and to a lesser extent, our heat pump water heater. We just don’t have the same gut wrench when the thermostat is low. And, if we are controlling temperature mostly for comfort when it’s expensive, why not dial it in more accurately when the cost doesn’t change much and our state utility tells us our high production burdens them? Increasing kwh cost will eventually fix this. :)