I'm no expert, but I know they are brushless motors, and the only thing to "wear out" are the bearings. I have a feeling you'll either crash or have some other electronic or mechanical failure before the motors wear out. My Mavic Pro Platinum has the most flights of all my drones - it has 151 flights, over 21 hours of total air time, and over 126 total miles of flight on it. I'm sure that is really low. Maybe some others can chime in with their big numbers.