In cameras, this comes out in the form of your shutter life expectancy – or the approximate amount of times your shutter will function before it begins to hit the fan.
This is similar to your car needing some repair help after driving an incredible amount of miles, as predicted based on car model. Upon crossing this threshold, maintenance may be required to get these beautiful pieces of equipment in tip-top shape for the next photography adventure. Like all machinery, the mechanics of our cameras have their limits.