If a device is sensitive to a power cord it is very poorly designed.
I never understand why people make such generalizations like this.
Rwwear, your statement would then imply that Ken Stevens of CAT, Michael Elliot of Aria/Counterpoint, Alex Peychev of APL, Jim White of Aesthetix and Roger West of SoundLab, all designers of top-tier products that I have much experience with, are all poor designers. Products from these companies (in my system) respond significantly to power cord changes. Please do not attack the designer of the product but rather the implementer of the completed system.