Got the adapter:
https://imgur.com/a/QuhfbNo stability issues with Roon now. Both the iMac (w/ Roon Core) and BDP-1 are connected by Wi-fi. Solid connection so far. Latency's also much improved over the previous adapter that I shared. It's instant response in play/pause and loading. No detectable difference to me in latency between ethernet and wifi now. Superb.
The blue LED is a bit bright, so will tape it up.
I have double Jitterbug pictured in the photo just to show that option. Subject to change.
I won't comment on the sound of this adapter (w/ or without Jitterbug) vs. my ethernet w/ LPS powered switch (using either Cat 6 UTP or floating both ends on Cat 6a S/SSTP) as of now.
There are two consistent sonic aspects in particular that have stood out in all the comparisons between the various flash drives/portable drives, ethernet combinations, external usb drives, Jitterbugs, Roon vs. MPD. The first has to do with how the dark the background comes across as. The blacker the background, the more dynamic the music appears as. The second has to do with tightness of the sound. In particular, I've used a lot of percussion, bass and drums for the assessment of this portion. The transient information on drums is such a boon to have. You can really pick apart the air, velocity, attack, and resonance. (It did help me figure out what was wrong with the grounded shielded cables and why I stopped using them - will add that later on to my other post). There is another aspect to the sound (how open and fluid does it sound) that I've been looking at in various combinations. This one is harder to define or look at objectively...it's more of a feeling (at this point).
However, I did notice that the sound was initially very odd all of a sudden that was uncharacteristic. It was bright and screechy which wasn't there with the previous adapter. I knew something was odd right away and went searching. I checked the 'Services' tab and both Roon and MPD were turned ON simultaneously. The CPU was over 30%. I turned MPD off and the CPU dropped off. Currently holding steady at 19%. Sound returned to normal. Smooth again.
Since updating to the latest firmware, I have noticed that both Roon and MPD can sometimes be left ON together unlike before. It might be a good idea to check up on this from time to time to see what's ON/OFF. I also keep the Samba Server OFF. Just USB mount and Roon Ready turned ON.