Also, at least in the home electronics space, there is a good chance that the 'trash' in 3 years time will be better than the quality product today (in short term functionality if not in longevity).

12 years ago I bought the best quality TV I could afford. And while it still works perfectly, it's objectively worse in just about every way then a current TV costing 20% of what I paid for it. However since it was so expensive and still works I cannot really bring myself to replace it.