Interesting. I had not seen that article. The thrust of it seems aimed at "debunking" and telling certan manufacturer's "you know better." Graphs and math. The main (or one of the) conclusions seems to be: "
Thus the dielectric losses at audio frequencies where the cable is terminated into a low impedance load such as a loudpeaker are insignificant."
What is unclear to me is whether "dielectric loss" -- dissapation of energy as heat -- relates to what the audiophile cable manufacturers are addressing in attempts to reduce or mitigate signal contamination. i.e. the additive electrical energy put on the audio signal. The article was written before such efforts were made and does not discuss in those terms. Maybe the article is relevant, maybe not -- I'm not in a position to judge but the author seems to thrive on addressing "confusion clouded by industry snake oil." On the other hand the article makes no connection between its conclusions and what people hear from different cables. It does not seem to address sound other than to say "you can't here this" , nor does it present itself relating to specific claims made by audiophile cable manufacturers. It does not contain the word 'sound' although it does talk about the limits of human hearing.
Audiophile cables set out to differentiate themselves from one another and presumably differences in construction and materials may explain differences in sonic effect. All of which is not to say that certain claims made by certain cable sellers do not warrant scrutiny.