The article is correct about everything, IMHO. Placebo effect, habituation, and Concorde fallacy all apply. Nothing wrong with spending money on what makes you happy, but in the case of audio, couch time with a shrink may be cheaper for once.
Just to be clear, I have tried cables, never heard a difference. I prefer vinyl, but mainly for the artwork and nostalgia. I have a class A amp, but for the particular implementation (Pass) rather than for being class A. I have a $5K ladder DAC, but it is not clearly "better" than a $250 Δ𝚺.
MQA, cable lifters, burn in, outlets: LOL!