Is the Roon Nuceus device a good streamer?

I have owned a Roon Nucleus Plus server and give it two thumbs up.  It's really well designed and made and the USB port is "dead quiet", really good sounding box.  It also has the Roon software installed and "automagically" updates itself.  I've never experienced a problem with my Roon server, I suspect you won't either.

emergingsoul,

There is lots to learn in the new world of digital audio and streaming.  With the Roon Nucleus (or Nucleus Plus), the server is connected to the internet and (in my case) to an external hard drive via the USB connection, the second USB connection for outputting the digital signal to my external DAC.  I also have a subscription to Qobuz for streaming (I had Tidal in the past as well).  So when I access my library with the Roon app, and search for content (like "Beatles"), the Roon server shows my library as the content on my hard drive+the content for the Beatles on my Qobuz subscription.

So, to stream music, in addition to a server, like the Roon server (or a computer) you will need a subscription (like one to Tidal or Qobuz) and output the digital signal to a DAC, which might be built into your amplifier.