I direct your attention now to the existence of software bugs, in particular to their frequency of occurrence and the infrequency of patching in firmware device

I direct your attention now to the existence of software bugs, in particular to their frequency of occurrence and the infrequency of patching in firmware devices. You know what works better than everyone's software being correct, up to date, not affected by a log file filling the flash stick unexpectedly or the heat or a battery getting a bit hot or a null pointer error or being overloaded by needing to track too many other drones or sheer murphyesque buggery? Empty air. It's a well-proved safety technology, empty air. Doesn't require much in the way of upgrades to make it work, reverse and forward compatibility is assured, it's simple to implement and has an excellent record against catastrophic failure modes of the not-enough-space variety.