If the power cuts out and the drone is falling out of the sky, how useful is a software rule which is dependent on a computer that is now offline, a non-functio

If the power cuts out and the drone is falling out of the sky, how useful is a software rule which is dependent on a computer that is now offline, a non-functioning altimeter and a set of dead engines? (Spoiler: not very much) But of course, such thing would never happen. (Except it just did.)