My latest I ordered from DJI and it came in about two weeks ago. New motors, X brace shell. So far so good but it ain't a lot flights we're talking about here. One thing that might help with longevity is the heat produced by the motors is almost nil. Compared to the old motors the heat difference is substantial. Battery temps are also drastically reduced. Also, if you look at the new motors, the bottom design offers far better support it seems. But I could be mistaken. Time will tell but I am leaning on getting another one quickly as a spare since if I order soon my chances of getting the same shell type with wider ribbing and X brace is pretty good. DJI ain't talking much at all about this cause, after all, it's no different a situation as when the phantom 2 version 3 started coming in with relief gluing on the ESC wires. Stuff like this DJI keeps pretty quiet about.