Its hard to give you a exact time for how long any given unit can last OP. Because like any electronic device things can and do go wrong, but its a good piece of kit.
Any console bought new has a 1 year warranty which covers the console. If you look after it and follow the recommendations for where to place your console (ventilation etc) there is no reason why it would not last for a long time.
But if for some reason something does go wrong it is covered for 12 months as standard, but an extended warranty can be purchased if you wanted one.
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