What does it mean when we say Arc is designed to last at least ten years?Updated a year ago

Nearly all products are engineered with a minimum lifespan in mind - it's an important metric that guides design choices and benchmarks warranties. For example, a company may require that their product last at least three years. Now imagine that product has a button, and the company expects a user to press that button once a day. The engineers might spec a button that can withstand at least 1,095 presses (1 press x 365 days x 3 years) to meet the requirement. But reaching 1,095 presses does not mean the button will automatically fail. It simply means they can be very confident it won't fail before 1,095 presses. You get the idea. The same process applies to Arc, but with 10 years in mind.