....or the hyperbolic pontificators? :)
Full disclosure, I make my own power cords using Supra wire and their connectors. These are relatively inexpensive and they certainly do a fine job whether the component is tube or solid-state. And while I've experienced merelt changes or an occasional "improvement" in SQ from wire to wire, cables that, from my perspective, are priced absurdly high, make no sense.
The purveyors of those high-priced wires will, of course, disagree.