I had read many of those interesting articles in the past. Most of those are great in term of build quality. Also can be effective in minimizing electromagnetic interferences if done well.
In terms of measrable performance gains though, they often could not, and didn't make up for the difference in performance versus using stronger power supplies of decent quality, opamps, adc, dacs, volume controls, power amp sections, heatsinks dsps etc.
Just compare the av8805 vs sr6014, avr-x3600h measurement, you can see the effects, or lack off. There are plenty of measurment that support money can better spent on things that matter more, for more measurable audio performace.
I am only commenting on objective facts, not sound quality performace cited by people in sighted, not tightly controlled AB comparison listening tests.