@freelon @FishNamedDog @Strandjunker Quality increases are often taken into account when calculating inflation, but quality decreases are almost always not. Then someone has to make a subjective judgement how much the quality is worth.

Common inflation measures are useful in a very short timeframe, but very questionable when the timeframe is measured in decades. Most importantly, they should never be used as some sort of mathematical truth. They are a social sciences tool.