@audphile1 I'm "upgrading" my opinion from "very subtle" to "subtle" improvement after a few more hours of listening to some very familiar HR Jazz recordings via Qobuz.
I'm learning that sometimes when you a/b test and focus on trying to hear changes, there isn't much/any. Then when you are not paying attention, something makes you pause and take notice. That's what happened today.
I'm looking forward to hearing the SmoothLAN next.
FWIW the main reason I'm not trying a switch is I don't have any spare outlets. Lastly I have no doubt if I had a better streamer like an Aurender I wouldn't hear any difference. I'm just messing with low-cost, zero risk tweaks atm.