Why dont more standalone DACs come with ethernet???

PS Audio has done this for a while.  That's one thing that attracted me to the DSDjr.  I am now curious how something like an Innuos Zenith would sound compared to the PS Audio Bridge II.  Extra digital cable, extra power cord, extra rack space - significantly more cost. Is it six times better than the $1k Bridge II?  That will be an path for me to explore in the next couple years.

@jayrossi13 
The DSDjr is a Roon endpoint and a UPnP Server. I use Bubble UPnP. But your right, no storage. I think the only way to really know is to buy some streamers, connect to the DSDjr and compare to the Bridge II. Unfortunately it sounds expensive :)

@jayrossi13 
I don't know all the techno babble but I have a DSDjr and use the Bubble UPnP app.  That's all I need. 

@jumia

i guess an ethernet signal requires a transformation before being allowed into a dac via usb cable.

Maybe you will take this path if your ethernet in plugged into a computer or server which is connected to a DAC via USB.  However, many DACs take ethernet direct and there is no need for USB unless you want to connect another source with a USB output.  Ethernet and USB are both digital so there is no conversion between the two. The only thing that changes is the protocol that each technology is bound to.