I read a relatively recent article by the gentlemen who created the usb audio stream transfer standard (I don’t know the technical jargon, I apologize) that compared usb to Ethernet. It lauded the potential advantages of Ethernet but he was of the opinion that it would be quite some time before the benefits of Ethernet streaming would be able to be properly implemented and utilized, as most don’t do it properly. And that usb, when truly done properly, has a long life still ahead of it.
I have discussed this with both Steve and CTsooner. The answer depends on whom you ask. But the basic premise is that until the majority of music servers start to implement a proper dedicated Ethernet music output directed specifically from the server to the DAC (separate from the Ethernet entering the server from the switch or router), we are not getting the most it can offer, not close.
There are only a handful of dac’s that even have a properly implemented Ethernet input. And even fewer music servers that have a properly implemented dedicated Ethernet output. I can honestly only think of 2’ish.
Just because something is theoretically the best doesn’t make its current implementation of that technology the best. Eventually I have no doubt it will be the standard. But for now, with the equipment I have, usb is king.