[mihaaly]

That 4x1000 is more like 1000+1100+1200+1400 in present value, also you have to go out on moment's notice when it brokes down and get something just to have anything to store food in, forced into new 'features' while basic things malfunction (like in ours the cool box breaks easily because it is redesigned from a brand new weak material), also I mostly (almost exclusively?) need the feature of cold that was there for long time. Don't expect much more from a fridge than storing food in it for long. Energy efficiency is a good improvement, yet littering the Earth with 4x the fridge is not, absolutely not.

'Stuck' with something good and reliable is good thing for god's sake!! Where the minds got distorted into this get a lot new things fast, just because it is Brand New kind of nonsense?....

[mercutio2]

Why does your NPV calculation include a negative discount function?

There's no reason to expect refrigerators of constant quality to get more expensive in real terms, and NPV calculations traditionally assume a reasonable (and positive) cost of capital, likely exceeding the rate of inflation.

So I would've said 1000 + 920 + 850 + 780, or something like that.

[mihaaly]

No reason?

You mean no such reason that you want to find. Same extremely lowered (shit) quality things cost same present value, so increased through time with inflation, items made more complex as this is the case with fridges involving unnecessary 'engineering' and 'development', adding additional costs, old inventions hit wall for improvements after a while, probably we could find some more reasons if we analyse how prices increase for the same kind of product in time, which is the norm for things exist for multiple decades. (you may think about months or few years timespan here of new inventions/developments with maturing manufacturing and the pay off of investments of develping something new, but it is so very far from the situation here).