When I first read about this kind of stuff I would think it’s crazy talk. But I can say that disconnecting the Ethernet cable and just using WIFi with my Stack Audio Link II, makes a noticeable improvement going into my Mscaler/Dave setup. Even leaving WiFi on but it plugging the Ethernet cable back in changed it for the worst.
My cable is just an Amazon cat 8 coming out of an at&t wifi extender. I believe it’s the cheap extender that’s causing loss in sound quality due to cheap power adapter.
So luckily have option to just use wifi instead of Ethernet but can get drop outs with some hires audio.