I spoke to an EE friend who is designing next generation 6G hardware; i.e. he knows something about this topic. I asked about stacking switches. He quickly replied that the addition of each switch degrades latency. Pure and simple.
So, the good news; properly dealing with ethernet is important. Apparently, deliberately degrading the signal is changing the sound. Just like other areas of audio, some types of distortion can seem to be a solution for other issues.
The bad news, properly dealing with ethernet is important. Stacking switches is not a solution.