When you have more technical knowledge some things look obvious that others can’t see. For instance, if someone claimed the system sounded better if there was a 10 gallon vat of steaming split pea soup in the room, most would be skeptical, as we can’t imagine how such a thing could have any impact on the system and the sound that comes out.
So, to me, when there is talk of changing the nature of the ethernet infrastructure, I can see things that most people cannot due to an understanding of physics and digital technology, and such things appear to be completely out of the ream of something that can impact the sound, unless there are some sort of EMI emissions that get into the analog realm. The beauty of digital is that an accurate bitwise copy is always available. Once those bits get into a dac, well that is where a lot of variability can exist. Same with the rest of the analog realm--extremely complex interactions in the overall system.
So, that is how it looks to me. Not going to convince any who has a strong feeling on the subject, but again, we want to make sure noobs hear a few options. At the very least, its safe to say invest in good electronics and maybe room treatments first.