Ag is the best conductive material, but is not as corrosive resistant as Au. Ag is also tarnishes, losing it's conductive properties where Au doesn't. Au is also an antibacterial and not toxic material and is used in medicine for this, even if we have cheaper alternatives.
As a fun note, Au is used as a lubricant in the industry sometimes :)
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lol, I just always took the 2% of gold mined is used in the industry for granted and never really thought about it. Guess there will be a significantly rising demand for gold in the industry as well.