I worked at Nest on their professional distribution channel for some time. The thermostat market is dominated by professional sales (80-90% are sold and installed by professional HVAC contractors) whereas Nest traditionally sold through to a consumer&#x2F;DIY audience. Nest has a very steep uphill battle against Honeywell the way Apple has had an uphill battle against Windows in large enterprise. Nest just has more mindshare amongst the tech&#x2F;early adopter community.