These network switches don’t “add” anything to audio per se …,what they are designed are to do is “reduce / eliminate “ network and router noise and jitter in streaming .
We all intuitively exercise caution on new things, but as I see it, unless you have a a high-end streamer in a high-end system, it becomes a question of cash outlay versus value received matrix debate , in the streamer noise floor reduction and streamer jitter reduction
“Price is what you pay. Value is what you get.”
WARREN BUFFETT
Here’s a bevy of respected reviews - both text and YouTube - that assess these devices as “anything but” your suggested abbreviated edit as “snake oil”
I’m most curious as to what do the grassroots AGON-ers have to say based on their live experience. There are numerous alternate brands and escalating pricepoints ….
https://hifiplus.com/articles/english-electric-8switch-streaming-audio-network-switch/
https://forum.psaudio.com/t/english-electric-8switch/22971
YOUTUBE:
https://youtu.be/INQRdKoOiGg?si=sOKEjfMjIkT-Cc-6
https://youtu.be/WuQSA7sRWfA?si=YK3NQXBEiIqFGFg7