I have a Weiss DAC501-MK2. I use it exclusively as a Roon endpoint with Qobuz. I have also tried Audirvana with Qobuz via the UPnP endpoint on the Weiss DAC. It has all worked flawlessly, although I gave up on Audirvana for the really poor user interface/experience vs. what I get with Roon.
In any case, I have no ethernet connectivity issues. I use AT&T gigabit fiber service.

