Network Switches

I can help you understand, although it’s self explanatory.

ultraRendu has optical input. So you need a fiber cable to feed it. So you ‘turn around” the EtherRegen.

That switch is more than galvanic isolation that fiber provides. EtherREGEN has two isolated data/power/clock domains. Each isolated domain is re-clocked using 10GHz-capable ultra-low-jitter (less than 0.8 picoseconds) differential flip-flops. So full isolation and reclocker 

That EtherRegen does seem like something interesting if you have an RJ45 input in your DAC with a built-in Roon Ready Media Server in the DAC, such as a Lyngdorf 3400 integrated. If you used the Sonore USB based output products on this Integrated you would be wasting money by not using the built-in RJ45 streaming of the DAC.

Exactly why it is on my very interested list as my EX8 has just that input for streaming too.

Thyname
Right now I do not, once I bought the EX8 I sold off all the equipment that this unit replaced, DAC, Headphone amp etc.
However I have tried the USB input from my iPad mini2 using Amazon UltraHd tracks and I have to admit that it sounded pretty darn good to say the iPad is streaming over my wifi network.
So yes I am of an open mind as obviously the EX8 trying to be a swiss army knife cannot hope to compete with more costly item specific units.

Yeah... I agree in your case there is no need to maintain other devices. The Ayre EX-8 would indeed take care of everything as one-box solution. Enjoy!