Your oven - a device with one moving part, and which functionally can be either "on" or "off" - stops working because a tiny capacitor exploded on the circuit board buried deep in the control panel and it costs hundreds of dollars to get a visit from an authorised screwdriver turner to replace it. The oven still doesn't work until you collectively figure out you have to set the time on the digital clock first, and you're reminded of this needless complication every time there's a power outage.