Wait, people actually thought it makes a difference?!
Say it ain't so!
Oh yeah they pull the conductivity charts. Understandably one can see how much better silver is than copper, etc.
What they fail to mention is some of the most important factors such as cross sectional area and length.
This is why we have wire ampacity charts. The longer the wire, the heavier gauge necessary to prevent excessive voltage drop at a given load.
When you're talking the cross sectional area of a mechanical mod and the path from the power cell to the load, the (material) difference is infinitesimal.
Then again, you have folks that swear by certain types of speaker wire, HDMI cables, the works.
Things that really do matter are contact points. And it's easy to tell if you have a problem. A hot button is a dead giveaway of power loss. Granted it's not a lot of power but a loss nonetheless. I've heard nonsense about a hot button killing half of your power!
Let's say your build is pulling 75W. You mean to tell me that hot button is really dissipating ~38W? Really? Tell you what. Set your power on a reg device to a mere 35W and tell me how hot that coil gets compared to that button. I thought so. Does this mean we should ignore hot button syndrome? Of course not! But you get the idea.