Anybody want a laugh?

Don't think so. Once something is transparent it can't get more transparent. I could add things to color in different ways but not me . Streaming over ethernet isn't rocket science and as long as you have good basic components and your noise floor before the amp is -118 no need for these tweaks that can't be heard except by my dog. 

There is no such thing : a sound without "color"....An uncolored sound means nothing in an absolute sense...

All sound coming from a room, a particular house, a specific electrical grid, a particular audio system is colored in some way for some particular ears that listen to these same" colors" in their particular way and will perceive them in their own way...

Tweaks by themselves are only that: tweaks useful or not....

But controlling the mechanical, electrical and acoustical embeddings amount to more than using a tweak or 2....It need to be take care of in a systematic experimental way.....It is possible, cheap, and audible by me , my dog, and even my wife (perhaps not my wife).... :)

There is no such thing that a sound without "color"

Which is why I said before the amp. If the signal over noise and distortion on the analog outputs of the DAC is below human hearing then it’s transparent and all those streamers, switches and routers and whatever upstream doesn’t amount to diddley. Now after the signal hits the speaker and how it interacts with the room is a different story.

I didn't see in the photo where one would pour snake oil into the switch.

I think that when spending beaucoup bucks on a hifi, people figure a couple hundred extra on a router with noise management as a design focus, regardless of actual merit, is not a big deal. An insurance policy at worst.

Again, there are some I know with very well thought out and resolving setups, who I do not suspect of imagining things, who claim the device covered in the white paper did make a difference. So I have to give them the benefit of the doubt. To me, if there is noise on a circuit, all devices connected to the circuit MIGHT be affected.

Personally, I’ve used wireless network connections to my streamers exclusively now for many years with excellent results so I am more than pleased with that approach.  Always dead quiet with top notch detail, if you have the right gear to show it.