Ys gotta figure, it can’t be that hard to pull 10 units at random for production release inventory and fly them in all aspects for 10 hours each to discover potential system faults. Better still, build a few pre production test beds that are tested for many hours in a manner that exceeds design capabilities. Once you have consistency with pre production units move on to random testing of production.
We certainly are not seeing any practices consistent with process and product reliability improvement. With their history for the last couple years we might think they would have learned something and stepped up by now.