I'd give an example with a printer. Refillable Ink-jet - a very low cost per page, indeed. After some time (approx 2y - warranty time in the EU; 5-6k pages/yea

I'd give an example with a printer. Refillable Ink-jet - a very low cost per page, indeed. After some time (approx 2y - warranty time in the EU; 5-6k pages/year), it started having an issue feeding paper, press the button to retry, it may work - frustrating, I know. 'Till one day it stopped altogether. It took me some time to figure it out - in short the tension springs were anemic to a high extent. So no tension on the paper rolls - no feed. Replacing the springs with imported ones (around 5-6 times more tension force) has made the printer not skip a page. The original springs like 1 cent together. The replacement cost was like 40cent for 10 - retail. There is no way the manufacturer was unaware.