"Audiophile Grade" Ethernet Switches - The new generation

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how can you judge / condemn without having listened to the ER? 

As far as I'm aware, I'm neither judging nor condemning, if you're referring to what other people have reported hearing -- that's entirely their business and doesn't necessarily have any bearing on what I personally might hear.  Different systems, different rooms, different ears, different brains, etc.  That said, it seems reasonable to express some scepticism about the ER's objective behaviour, based on what I have read about its design and intended purpose -- including what UpTone themselves say (and don't say).  By the way, as I posted a while back, I have not ruled out trying one at some point.