*waggles hand in a so-so motion* There's a big difference between consumer products and something designed to last as long as physically possible. NASA, im particular, is well known for over designing the holy and unholy hell out of everything they make, to often spectacular results. They take their times, sometimes a decade or more, to go over every last excruciating detail of probes and rovers. But the results tend to speak for themselves. They don't always get it right, but when they do? The voyager probes are only one example of hilarious overachievement. The various rovers, such as Spirit and Opportunity, both of which FAR exceeded their designed like expectancy, are another example. The longer lasting of the two made it 15 years on a 90 day mission, for example...