Extended warranty is great. But that is normally being offered as an extra peace of mind and usually is good for accidental damages, like breaking the glass or misues.
Apple was the first extended Warranties (not insurance) that I saw, that cover accidental damage. Could you get this type of warranty on other products ?
If a part is designed to be pushed it has to be able to be pushed as many times as they consider normal usage over the lifetime of that product. I do not believe they designed the phone with a lifetime of 12 months. IF they did, well then it is a substandard product. IF not then the part is defective. Makes sense?
I agree that a button shoud be push as many time it needed to be push. I also agree that I never had that problem with any of my other iPhone, so to me, it does show a weekness.
I do not know at which percentage a part is consider a defect or a design failure, but when I read about product rate of DOA (Dead on Arrival) and it is not consider a problem, I guess you would need a very high number to be classified as an design failure.
Exemple: PS4 is below 1% of failure rate (not DOA but still high)
With less than 1 percent of shipped systems affected by these problems (up from 0.4 percent in a previous claim), the number of broken systems is reportedly within the "expected range" for a product launch.
http://n4g.com/news/1397203/sony-updates-ps4-failure-rate-numbers-to-less-than-1
from this http://www.statisticbrain.com/iphone-5-sales-statistics/
we see 89 millions iPhone 5 sold so far. At PS4 rate, let's say 0.5% that would mean 445000 non working iPhone would be consider by Sony as an Expected range :-)
I dont think it is ok to think like that, but I don't think we are at those number yet.
Maybe in 2 year, if that number is high enough, Apple would do something about it, like they did for Battery, and white plastic getting yellow and other recall for defect that was beeing seen on a large enough number of device.