Why would I need Roon?

Just confirmed what @jaytor said. I cannot make do with just my Bluesound Node2i. I’d still need a PC server running soon. A Node2i does not run the Roon “Core” application.

"Roon is a server and client based system so always requires the core server part to be running on a pc or Nas type device.”
https://community.roonlabs.com/t/seriously-how-to-use-my-node-2i/97094/11

This means that if one has bought one of the most popular, affordable streamers out there, one still needs more to use Roon. This is something I hadn’t considered.

If I am wrong about this, please tell me.

Roon is an easy trove finder of stuff to get at. It excels at the depth of information. At times I want to know the players and can’t with my Qobuz/Lumin interface. 
I tried Roon but couldn’t find a way to run my online albums and playlists at Qobuz on a Lumin. Did I get this wrong?

OP.  You need something to run Roon Core.  A decent PC will work and some but not all NAS drives will work.  You can find plenty of suggestions on the Roon website.  

If you intended to use Roon long term, I suggest to invest in a decent NUC - especially, if you intend to use some of Roon’s more resource intensive DSP capabilities like upscaling.  Roon has by far the best music management interface and capabilities of any software that I’ve used to date.  To enjoy it, you’ll need a capable Roon Core host device.  

OP - I believe you can run Roon on your PC and then use the Node2i as the endpoint.  That way the PC does all the work but the endpoint is away from the noise of the PC so it should sound better (in theory, according to Roon).  I use a Raspberry Pi as my endpoint and the PC as the core.  Works fine (although as I stated, I'm not a fan of Roon's sound compared to other providers) 

@barts 

Your setup is similar to mine except I have an external DACalizer.  When you gots a few minutes to play around why don’t you fire up a Roon core on your network (pc,linux or Mac) host.  Really easy then to switch the BDP to an endpoint.  Roon Core will see it strait away, then just log into your Qobuz account.  I even have a code for a 60 day trial of Roon that came with my SGC ST I will let you have if you want to do some testing.   Get a 2nd opinion on how the MPD running on Manic Moose compares to The Roons.