Anyone who's visited TSMC can tell you drive unit failures have been happening before 100k miles let alone a entire million.
People have had back to back drive unit failures on new cars.
I recall a MS owner getting the run around about an impending DU failure (which manifests as a whine under acceleration) as their warranty was about to expire, only to have it fail out of warranty.
Now people are trying to DIY DU whine on cars that haven't even made it to 100k.
Running a DU in a simulated 1 million mile test is nowhere near the same as actually lasting 1 million miles in the real world over as many years as that would take.