I have been quiet on this thread or a while as it devolved. I am going to step back in gently to point out to @tvrgeek that I did point you to proof that other things are carried along. Hans Beekhuyzen measured it. You dismissed it as irrelevant. Yet, it is there. You believe it cannot impact the sound quality and it’s possible you’re correct. But, you disallow for the possibility that you are not correct. There is noise on the circuit. It can be measured.
May I suggest that we discontinue the discussion. Some of us have experience beneficial impact from improved network switches. Others believe that cannot be the case. There is some evidence to support both positions. Neither position is fully validated by what is known or what can be measured.
Let’s leave it there.
Peace.