I've once heard a saying - An electronic device fails quickly or lasts forever. Do you agree that? My experiences are 1. My iPhone 5s failed totally in 11.5 months' time, 15 days before warranty expired, I got replacement, and the new iPhone lasts another 5 years, without major problems, and only a dark line shows up on the side of the screen recently, but it still works. 2. My Samsung PC screen failed in 2 years' time after purchase, luckily warranty covered again, some parts were replaced for free and then after 10 years, today it 's still working perfectly. The screen has been used for 12 years of time now. 3. A cheap digital clock (about $5 bucks) didn't show up text correctly on opening and setting up time and alarm was not possible. I went for replacement of another one it just works totally and perfectly for another two years. Is there any research on this topic by scientists or professors? What's the main reason behind?