Coming from a state run engineering enterprise, where every motor is purchased from the lowest bidder, even the worst quality motors run for decades before even showing signs of any trouble, including mechanical.

For a car like the Tesla, it's hard to believe that the motor will give any sort of trouble.

Also, most electric motors, even those driven by variable frequency drives, are extremely simple in construction and are extremely resilient to shocks and prolonged use.

Almost all modern motors have efficiencies upwards of 97.5%, so you have very less heating losses and mechanical losses even in the most demanding conditions.