Google has officially turned these Nest thermostats back into dumb thermostats

Google has removed support for its Nest thermostats, effectively turning them into dumb thermostats. The company announced that it will no longer provide software updates or support for the devices, which were first released in 2011. This means that users will no longer receive any new features, security patches, or bug fixes. The Nest Learning Thermostat (3rd Generation) and Nest E are the affected devices. Google has not provided a specific reason for ending support, but it's likely due to the devices' age and the fact that they are no longer a major part of the company's smart home offerings. Users are advised to consider replacing their Nest thermostats with newer, more secure devices.