Anybody gone from ethernet to optical for connection to a streamer?

I assume you are talking about optical ethernet. I'm in the same boat. I've recently purchased a Sonore OpticalRendu, but am waiting on a power supply to be able to hook it u.

I don't have optical ethernet capability, but I have to say that, from my CD player to my DAC, I'm not going back to traditional interconnects from an Optical one I installed a couple months ago. Just a little bit higher fidelity in every respect.

Yes, it made a worthwhile improvement in my steaming setup. In my case I place optical between server and Usb renderer (Sotm sms 200 neo, powered by Uptone Js-2 lps). Use two TP Link MC200CM, both powered with LPS for the conversion.

Optical conversion galvanically isolates from ground noise on ethernet. Result, blacker background, higher resolution thing.

I've found optimizing streaming is complex undertaking, steaming setup much more complex than my analog. I used Audiophilesyle forums as my guide for setup, steaming now preferable to my pretty nice analog setup for sound quality.