Thank you for your insight and sharing of your perspective. This system leads to some interesting conclusions and observations. One is, that it explains why big brand products made a significant dive in quality. My decades old bose QC25 where of superb quality at 250 € while my somewhat new Bose quiet comfort ultras priced at 350 € are of comparatively very poor quality.

It also opens the market for cheap knockoffs. If some chi-fi headphones for 60 bucks are almost as good as the big brands and the big US brands are forced for high prices despite the bad build quality by Amazon, another big seller website should emerge. Oh wait, this already happened with AliExpress and temu.