The shameful part is that the only thing that even remotely (no pun intended) needs a server to even be online, is the out-of-home control, just for NAT traversal. It should be free to Google for these to have at least in-home smart functionality forever.
Well, that, and the moving target of updating an "app" every year for all the breaking changes Google and (especially) Apple do to the mobile OS. Although honestly I'd rather have a QR code that links you to a PWA hosted on the thermostat itself.
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