> On an aircraft there is almost no powered circuit without a breaker to enable the crew to shut it down if malfunctions, or worse yet catches fire. So a crew that has prepared properly will still be able to go dark.

I think "crew" is the key part here, right? I understand a system like this would be designed in such a way a single crew member could not make a plane go dark -- or make it stay dark after disabling the safety systems. For example, a rogue pilot can manage to turn the beacons off, but any other from the cabin crew can just turn it on again while the pilot is in the cockpit, etc.

I still need to find out which changes this even brought to the entire airline ecosystem.