Google Nest Community

I dont think so. I disabled preview programme because it was really unstable.

Not possible to remotely update bricked device. 

Kidding right? Remotely bricked device isnt something you have just mentioned.

They do not need to receive messages from us. They know how many devices this update was pushed to and how many of those device didnt come back online. They KNOW.

Basically they can force you to buy new device every 1 or 2 years (depending on your country) just by bricking it remotely some time after warranty runs out.