Speaker wire, RCA interconnects, XLR, power cords, crossover wiring inside REALLY expensive speakers, etc. And now, wait for it, whole home ethernet wiring. What the hell? Replace everything!
What next? Re-run all home AC wiring with extra-homogeneous ceramic coated, diamond encrusted gold-core? No settle time required and quick burn-in guaranteed. And, of course, the POSITIVE increase in audio sound quality is always mind boggling. Shame on those who cannot hear the voodoo difference.
I occasionally thank God he made me wise enough recognize the scams despite the eloquence of those touting their wasted money.