Do I really need a separate Roon Core (computer) to use Roon Software?

The way I understand it, there are basically 4 devices required to use Roon software to play digital music files (whether from local file storage or streaming). 1. The Roon Core on which the software is installed. 2. A streamer, which takes the datastream from the core (via Ethernet) and provides a high quality input to the DAC. 3. The DAC. 4. And finally an optional controller such as a smartphone or tablet. Seems like a lot of hardware. 
Many people rave about Roon being so fantastic, but is it really worth adding another piece of hardware, power supply, power cord, interconnect, and ongoing maintenance of that hardware?

Currently, I have a LUMIN D1, which is a streamer DAC combo, and I like it. But I’m wondering what Roon would bring to the party.

So my second question is: Is there any hardware that includes the “Core” within the streaming device instead of requiring a separate piece? I found the ELAC Discovery DS-S101-G, but it does not include MQA nor Qobuz, and seems to be obsolete already. I’m kind of old school, and prefer the one box solution for sources. I’m not interested in hooking up a computer to my rig either.  Thanks in advance for any wisdom or advice!
One more question, does the computer acting as the Core need to be connected to my network via Ethernet cable (i.e. NOT wi-fi)?

What makes you say this / ask this question?

The answer to your posted question is no, it does not.

The answer to the above (my) question will help drive greater understanding and learning.
One more question, does the computer acting as the Core need to be connected to my network via Ethernet cable (i.e. NOT wi-fi)?

Depends how reliable your Wifi is, but Roon does not make this a requirement.  My Roon core is hidden in a closet and uses 5 GHz for everything.

If you don’t have one, I suggest you get a free phone based wifi analyzer app to help you pick the least congested channels.


Thanks again to everyone providing responses. Maybe I could have found the answers on the Roon support forum, but you folks have helped me very much. Have a great day!
@rockrider I’m not sure, in your case, how much (the degree) Roon Support will be helpful. It might be...but it’s structured for folks who are farther along in "computer literacy." 

There is nothing wrong about not "knowing" the ins and outs of computer related stuff and "computer" based audio. Even those with deeper knowledge struggle (at times, if not often).

I suggest catching up via online introductory primers on computers, networking, etc. first. Once you have the fundamentals down and understand them, the rest will follow.
You can run a music server on any supported platform you choose and may already own.