I like full busing chains when there is no shifting sideways, the roller rotates supported on a wide surface .. much longer wear ..
gold is so soft as to be meaningless, It's just decoration, jewelry.

now if you have a Titanium-Nitride process on steel, then there is surface durability improvement.
that is done for industrial gears, but don't recall seeing bike stuff nitrided.

I got a NOS 3/32 chain from Harris a year ago, one on my Brompton,
the other on my Rohloff Koga, been fine, they are Whipperman made .
and black steel. keeping adequate lubrication keeps them rust free..