To give a better and perhaps more relevant example: The wiring and many electrical devices in my house are over half a century old, yet all the switches and outlets still function perfectly fine.
Just to make a counterpoint. The wiring and many electrical devices in my house are over half a century old, the entire circuit breaker panel needed to be replaced a few years ago, the light in the bathroom actually just stopped working a couple weeks ago, i've replaced both the switch and the light fixture itself, but still no light so it's looking like it may be damage to the wiring, outlets are extremely easy to overload and a couple just don't work at all, there's actually an extension cord running from the basement through the floor connected to a working outlet there to replace one of the non-functional outlets.
