If a sufficiently robust integrity check is used, then an update failure is just a no-op, not a bricked (or even reduced capability) device, no?
Now, pushing a bad firmware version is another story, and impossible to prevent unless the firmware updater contains some impossibly complex static analysis tools to formally verify some set of correctness properties of the incoming update.
Now, pushing a bad firmware version is another story, and impossible to prevent unless the firmware updater contains some impossibly complex static analysis tools to formally verify some set of correctness properties of the incoming update.