Yes, and that motor operates in a practically constant external temperature and likely fairly constant humidity, with very few shakings of the environment in which it operates - it's about as optimal for electric motor use case that could be imagined.

A car's motor is in the elements, and gets bumped around and otherwise has to keep working in a non-optimal environment.

I'd say if motor survives 15 years, that's plenty, as the kinds of folks who buy BMWs tend to buy new at least every 10 years, I suspect.

The OTHER thing people I think are missing in this discussion is: how much OTHER car tech is going to improve over, say, that 15 year time? Advanced driver safety tech alone may make buying a new car a wise choice, vs servicing an older, less-tech-capable vehicle, for certain market segments.