Tom's Hardware also had an article not long ago about there being no audible difference between a fancy cable and a trough of mud https://news.ycombinator.com/item?id=47015987

Electronics too! While there are measurable differences there are no audible differences between fancy DACs and the $10 dongle Apple sells, for prerecorded music at least. You had to pay thousands to get this kind of performance in the late 90's. https://www.kenrockwell.com/apple/lightning-adapter-audio-qu...

If you want good sound you can still spend money on big speakers and room treatments though. Physics.