So would a 2.4GHz WiFi, too. But seriously, even copper Ethernet has galvanic isolation (maybe not sufficient to survive a direct lightning hit, but then you really do have bigger problems!) so, again assuming a minimally competent design and no use of “audiophile” shielded “Ethernet” cables (which generally tend to fail at being Ethernet) this is a non-issue.
If anything, both WiFi and fiber SFPs add some comparatively noisy transceivers producing lots of high-frequency noise. Right inside that precious streamer
Of course in the real world it is not a problem but it is amusing that nervous cable tinkerers in their quest for darkening blacks and lifting veils would be just adding sources of high-frequency noise to their systems…
It’s quite interesting that when you look at professional studio equipment (you know, the stuff being used to actually produce all that music you listen to, so you’d think they would not be putting any extra noise into it) you will be hard pressed to find a single SFP module there, let alone using WiFi for anything where timing is important…




