I had a big chest freezer about 25yrs old and working perfectly but in my garage and getting a bit rusty and tatty as I often used it as a workbench. I had two smaller fridge/freezes indoors all of which had been replaced 3or4 times in the same time period. They used to make things to last once but now for various reasons (good or bad) it is no longer the case. Apart from failure of the item we also have the fashion or updating factors resulting in perfectly good few year old appliances being just thrown away as they have virtually no second hand value. Back to your point I would expect a modern one to last a min of 5yrs.
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