> The question is how long something lasts without needing any repair. The warranty is a good approximation of this.

No, it's not. That's why some manufacturers offer much longer warranties than others despite having similar reliability numbers. Warranty terms are driven by the business and encompass a lot more than mean time to first failure.

> iPhones are irrelevant to the discussion, lol.

If warranties were a good approximation of how long things last without repair, why would that only apply in the car world?