"The average replacement cycle for mobile phones in year 2000 was 21 months. By year 2006 it was down to 18 months. Today it is 16 months (all handsets). For smartphones it is even faster, at 11.5 months. A car is replaced something like every 3 or 4 years on average. A TV set once every 7 years. A personal computer every 3 and a half years."
Last summer I ran across a treadle-powered sewing machine at a nearby garage sale (pictured below, not the actual one). In addition to being a bona-fide work of art, I'm sure it worked as well as when it was first made. And it doesn't even need electricity.