Hunting Unicorns


Why is it so difficult/impractical/impossible to design a music server requiring no external control device such as a laptop or tablet? The Aurender A100H seems nearest to what I want -- onboard storage, USB output, no DAC, no volume control. But as I understand it, even this requires "iPad control via the Conductor app" and offers no access to web-based streaming radio stations. So, like many others posting here, I'm "wasting" a Macbook Pro as my digital music source, feeding USB to a streamer/DAC/digital preamp combo device. 

To rephrase: why can't I have just one box receiving everything from everywhere, and sending anything via USB to my favorite outboard DAC? Of course this unicorn WOULD have its own dedicated remote that is not itself a computer.

Advance apologies for what is very likely a dumb question generated by an ancient, analog-wired brain.
hickamore
There are components that will do what you want except for the remote control as far as I know they all use an app on a tablet/smart phone/ computer or web interface to control the media. Might be something out there but I have never come across it.
erik_squires the hidden Linux box plus inexpensive streamer sounds good, but apparently you still need at least a phone. My unattainable object is something requiring no external multi-purpose device. From ddude03 above I gather that even Lumen needs your phone. 
If there was such a product I suspect the "remote" would end up looking like a tablet because of the amount of info that needs to be displayed. If you want the same functionality as a control app you either need a control app or a device that acts like one.
Not sure what the OP is looking for. Most streaming services have tens of millions of tracks to choose from. How is one supposed to wade through all of that to choose what you want to play without some type of visual display? An old style remote gives no feedback about where you are in the selection process unless there is a visual display somewhere. That means you will either have to stand at the streamer to read the display, or it needs to be large enough to be read from across the room while you’re playing with the remote. Or, if the remote has its own display, you’re back to having the equivalent of a table or smartphone in your hands, albeit one that has no other function.

Most people already own a smartphone or tablet, and for those that don’t, a Kindle Fire is available for $50, or less if they are on sale. That is a drop in the bucket compared to what most streamers (other than the Raspberry Pi option) cost.

So we are back to this - what problem are we solving?