Bottom line, we don’t know what to measure and/or there’s a poor correlation to what we can measure and what we “subjectively” like to hear. Measurements are no substitute for demoing to find what “you” like. Our hearing acuity is much more complex than current science can measure.
Some come on this forum expecting us to “prove it” before they may even consider (if at all) to purchase. Many don’t bother to try themselves which is the only way to find “their sonic preferences”.
Also, a few seem to have preconceived notions such as “it’s false until proven true”, “it’s true until proven false “, “my reasoning is universal truth for all”, “my perception is universal truth for all”.
I simply look at the information, and if enough people are experiencing improvements with an audio component or tweak, then “chances are” I’ll get a similar result- there are no guarantees.
For network switches, I’ll probably settle with Network Acoustics’ switch, filter, cable. I also read good things about Synergistic Research switch and Ethernet cable. Reports that additional switches have offer sonic upticks but at diminishing returns. Not sure if I want to spend additional $ down this rabbit hole. I’m not a fan of messy looking extra eternal linear power supplies, external master clocks, and the cabling needed for them.