I forgot about the Yamaha Hamilton plating.
I'll tell you one thing though, when taking pics of someone holding a clarinet with gold plating it certainly shows off well. Gold on a black/dark instrument is really pronounced. That was the main reason i wanted it done .. it looks awesome.
Also the visual contrast is similar to red or black pads on a brass gold lacquer sax.
And the reason green or red felts are used on brass instruments (and saxes). White felt is just lost visually.
Sometimes the "look" is worth it.
I can't see gold plating my RC Prestige because the silver plating on it is so nice, same with my Leblanc LLs
On my R13 I can see redoing the nickel keywork though, but I play my RC mostly.