About a year ago I wondered if there was a MTBF (mean time before failure) for DJI motors, computer hard drive manufacturers list a MTFB for their drives. I spent some time trying to find same but as far as I can see one does not exist. Would be reassuring if DJI researched and produced MTBF for their motors.After reading about Southwest plane engine failure, what is the longevity of my P4 engines?