tramaupat
I'm sure this must have been thought of before.... but if everyone has donned O2 masks in the case of smoke or fire, and given that many areas are hard to access, why not purge the aircraft of O2? or at least in areas of high risk like electronics?
You might be surprised to learn that in the event of a cabin fire the pax are not given O2 it is isolated to prevent the O2 feeding the fire.