Digital isolation between Ethernet hub and streamer

They work for some and for others not so much. Kind of like power cables and the like.  Don't be a binary thinker (cuts both ways) and just disqualify the product or people's position on that given product, positive or negative. 

I always like when somebody posts “This very inexpensive”.   It’s typically not “very inexpensive “ to me anyway’s.  When someone says to ME very inexpensive I think $20-$50US.  Not over $200US. Thats more like a, well let me look into it, and think about it.  Inexpensive is when I think, hum, $30-$40, I’ll try one out.  At $200 there’s a bunch out there and I already have plenty of that kind of thing.  
Of course, some people‘s idea of an expensive is different from other people’s idea of inexpensive.  

I have tried:

1. Network Acoustics Eno Streaming System. Did it do something ? Yes! It smoothed out dynamics, tamed the highs and relaxed the mids. Soundstage collapsed. None of the effects were desirable and I sold it

2. Fiber optic conversion - adds glassy and cold character. Didn’t mike it

3. iFi LAN iSilencer - made zero difference or if it did make a difference I can’t hear it. Because it does no harm I left it in my system 

Other than using the best possible Ethernet cable and keeping your network components out of your system and plugged into a different circuit, there’s nothing else to do with Ethernet. 

For you and your system. @audphile1 for others that is not the case.

Interested to know what FMC and FSP’s you used in your trial. I had the exact opposite experience but then again my network only has 2 meters of copper in it. And I use quality FMC and rolled FSP's to find the right combo. My entire house is fiber and our town is all fiber.

I have tried:

1. Network Acoustics Eno Streaming System. Did it do something ? Yes! It smoothed out dynamics, tamed the highs and relaxed the mids. Soundstage collapsed. None of the effects were desirable and I sold it

2. Fiber optic conversion - adds glassy and cold character. Didn’t mike it

3. iFi LAN iSilencer - made zero difference or if it did make a difference I can’t hear it. Because it does no harm I left it in my system

Other than using the best possible Ethernet cable and keeping your network components out of your system and plugged into a different circuit, there’s nothing else to do with Ethernet.

@luvtubes69 I was describing my experience in my system and I thought that was implied. 
I used the stuff I bought from amazon 

https://a.co/d/5HkmxgC

I set up my streaming with EERO mesh network. My Purist Audio Ethernet cable is 1m in length. It is connected to iFi gizmo on the EERO side and feeds my streamer directly.
My audio components are on two dedicated lines - one for Boulder 866 integrated amp, another for Aurender N200 streamer and Bricasti M3 DAC. 
The EERO mesh node is at least 1m away from my components and cables and it is plugged into a completely different circuit so there’s no chance for the EERO SMPS to contaminate the AC line my system is plugged into and near zero EMI and RFI pollution from it due to its proximity to the rest of my gear.

Ethernet cables make a difference, sometimes for the better, sometimes for the worst. Adding additional crapola to my system, converters, filters and switches is unnecessary clutter that contains boxes that generate additional EMI, RFI and AC line noise. That’s my personal approach after testing various tweaks and I won’t be revisiting this in the foreseeable future. I’d rather direct funds to upgrading components and cables than to fart around with network.