Update on good Ethernet switch

"None of them have yet to rationally explain using math or measurement data why digital transmission of music is not affected by the gear or cabling whereas measurement data can show faults in the data stream due to power supply issues, EMI and affects of wire capacitance, etc."

You are completely missing the point, or you simply do not understand the difference between analog error propagation and digital error correction. NOBODY is arguing that the digital data stream is unaffected by noise. The point is that the numerous layers of error correction all along the digital signal pathway, which includes dozens of commercial switches between the music streaming service and your home ISP gateway, detect and reject damaged data packets, and request that such packets be resent.

You are missing the point that DACs and music streamers are affected by electrical noise carried in on the network wiring.  It is not just about the 1’s and 0’s.  There is an analog component to the ethernet.

It's really disappointing to see how some members treat others. There are members with vast technical knowledge who post beneficial and accurate information to help us efficiently improve our audio systems and they are attacked and dismissed. It reminds me of people who believe the earth is flat - no amount of proof, technical knowledge, or patient explanation is sufficient.

I heard the flat earthers have members all around the globe.

OK, how about this solution then? Get rid of your switch altogether. Get the best Cat 8 cable you can afford, and hook it up directly between your ISP gateway and your streamer. If it matters to you, hire an electrician to move your gateway as close as possible to your streamer device. Don’t forget to create a Faraday cage around all of your equipment and cables. An aluminum faraday cage hat atop your head will also work wonders by intercepting communications from Planet Audio Malarkey.