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New - RBR850 / RBS850 Firmware Version 4.6.8.5 Released
Security Fixes:
Fixes security vulnerabilities.
For more information about security vulnerabilities, visit https://www.netgear.com/about/security.
Bug Fixes:
Fixes Armor activation ...
In my case, was a new building and installed wire set before sheet rock went up.
I just haven't installed or connected the power wired. Yet.
Nest most likely did the power stealing in an effort to be able to co-exist with older two wire systems that didn't have a common. The Nest does seem to favor HVAC systems over say a hydronic fossil fuel system, especially in a duel fuel/dual transformer system. I have gone many rounds with their senior support on this. The batteries in these and even older Honeywell thermostats I don't believe were never intended to run on battery alone. Honeywell, Ecobee, etc. will all recommend that you install them with a common wire so they have a constant power source.
Ever since google acquired nest they pretty much suck at addressing these issues, google pretty much stagnated the technology.