I agree with all that. It's mostly just placebo. However, I believe that a placebo effect can still be meaningful to a listener and enhance their enjoyment. If a person believes a cable, or battery, or power supply, or 24bit track is better, and it increases their enjoyment, then it really does. And good for them! It's their money. But that person probably shouldn't be discussing this in the sound science forum. Or maybe, definitely shouldn't I think my music sounds better when I listen to FLACs instead of lossy. My brain knows that's not true. But it makes my listening experience better. And it doesn't really hurt anyone. But you won't see me trying to convince people that FLACs are better.