While it would suck, I wouldn't expect a company to even call me back after my warranty has expired. Their liability has expired.
Here in Australia we have a provision in consumer law that states any item considered “durable” (meaning there’s a reasonable expectation of years of service) is covered for manufacturing or design defects regardless of how long the manufacturer’s warranty is; this is referred to as the doctrine of implied warranty. For example, there is a case where Samsung had to refund (not repair, it’s at the purchaser’s discretion) 70% of the purchase price of a TV set which failed after three years because there’s a reasonable expectation that an $8000 big screen TV should last for ten years.
Since these models are failing en masse this is clearly a manufacturing or design defect; in other words, the units had an underlying fault at the time of purchase, this isn’t just normal wear and tear. It’s illegal to sell faulty goods, so Apple remains liable despite the time elapsed before the symptoms appeared; the warranty period is actually irrelevant.