I agree with all your points; it's what I was thinking along while watching the video. I also don't accept that hypothesis that in general newer designed motors

I agree with all your points; it's what I was thinking along while watching the video. I also don't accept that hypothesis that in general newer designed motors fail earlier than older motors. I don't even accept it for being told that these two particular motors chosen at random. Will the newer motor in this video will fail before the older design in this video? Perhaps but I'd like to see some real evidence.