I still have a 30GB 4th gen iPod that works perfectly well. The battery life is even still usable (about 1/2 original) so I suspect the iPod classics that are currently out there will last a good long time. By the time most classic users (are there a lot of these?) have an issue I suspect the iPod Touch will be at 256GB or more and the iPhone double that. I do however, suspect that most iPods with hard drives will die from battery death long before their hard drives die (unless you're in the habit of dropping yours).