I was reading this thread and wondering what do I use everyday all day and night (average 14 hours a day) that's more than five years old...Needless to say, that list was VERY short. When I purchase a 5 year old car, do I expect the same performance or luxuries as a newer model? No I do not. As a business I can't continue to support the old merchandise forever or I would go out of business.
With that said, I suggest to keep using your iPhone of choice if you choose to until it stops working with the understanding it's not personal it's business.