Exactly. By changing the composition all the time of the CPI you're underreporting inflation. We all know about shrinkflation being common as well but shitflation is the worst one of them all because now you can't even spend a few more cents for the quality your favourite products have been turned into shit by means of substituting ingredients, worse customer service, tricks like subscription seat-heaters and so on. One of example of many is dairy products. The common yoghurt brands in my locale have started taking all the fat out of their so-called yoghurt, adding thickening agents and in a very small font labelling it 'low-fat'. Well that's not really yoghurt which is milk+culture is it? I can see why Germany has their beer purity law maybe a yoghurt purity law is in order too.