Earlier quoted context omitted.
How do you still have one that's running OK? My Apple products almost always "die" after a few years. I had the 5S but one day it crashed and would not turn back on no matter what I did. The iPhone I had before that did the same thing.
Is that a common issue? I've certainly heard about devices losing battery life and cameras progressively getting worse, but complete death is very uncommon unless you use it without a case and drop it all the time or something. I still have a working iPhone 5 (no S) with a home button that spins and a slightly broken screen bezel but no other issues.
At one point I thought it died permanently. But it turned out to only be the screen dimming to much. In bright light it auto adjusted enough to be visible, allowing me to rise the brightness.