Like I said, @holmz , all yours. Crazy posts draw out crazy people.
How would we know it is crazy?
There are no measurements or rational indicators to go by.
I can see inductors and transformers making a difference.
And the even capacitors and wire dielectrics.
It would be nice if someone could quantify some aspect of it.
All that needs to be done is some before and after of the DC power supply rail voltage. Without that, it seems like a story or myth.
But if it has some damage or needs rewiring, then changing it probably makes some sense.
Internal Wiring
Wiring is the signal path of any amplifier, and it does make a difference in both durability and performance. We use 18 gauge Military Standard 16878 teflon coated, silver plated copper wire. This is expensive (besides being a mouthful!), but is used in mission-critical applications like the Navy’s AEGIS cruisers. Teflon coating provides heat-protection for decades, where common PVC-coated wire will crack and degrade over time. The 18 gauge wire provides greater signal capability than a trace on a printed circuit board, and ensures that the amplifier will be stable under any condition, and will never limit the dynamic range or transient abilities of your amp.
They use that Tefzel stuff in plane and race cars, and it is also great at not chaffing through the insulation. But an amplifier is not usually vibrating like a race car or fighter jet, or rocket launch.
I use it myself, but it will not make an amplifier magic without the circuit design providing some of the magic.
It is much the same way that the most expensive saffron in the world, will not make a pork roast taste any better. But it might help an Indian curry .