With Roon, you can run Roon server/core on many devices of choice from existing home computer to audio "high end" server. Then you can stream from pretty much any device you choose, from smart phone to tablet to home computer all the way up to high end Roon Ready streamer.
That means you can start for minimal cost by leveraging hardware you already have, and go from there as you please. If you have the funds and desire, you might end up on dedicated "high end audio" hardware. Or not.
THe point is that cost of entry is minimal and you can "upgrade" from there as you please over time if needed. So you have tottal flexibility regarding how much you need to invest in a streaming solution that floats your boat.
At the opposite end is proprietary high end streaming solutions like Aurender. THis will cost you way more to start and meanwhile you have not even tried more cost effective solutions first to compare with.
Personally, any streamer I buy has to be Roon Ready or bust. Not interested in getting locked into any expensive high end audio boutique brand for something as widespread and growing these days as high res audio streaming.
I have heard high end Aurender (and Roon) for example sounding wonderful in various systems at high end shows. More costly systems should! With a proprietary hardware and software solution like Aurender you are taking a plunge into the deep end and will probably never look back. If you have the funds to do that, more power to you. But now you are locked into that particular company’s not inexpensive hardware and software solution. Many high end audiophiles with deep pockets are used to that so no problem. Whereas with Roon you get to choose from many options, from more common home and mobile computing devices to specialized hardware devices that are on-par with other high end specialty designs. I have yet to hear Roon disappoint. From headphones to my grandest system (pricey compared to teh norm yet still modest cost wise on teh grand scale of high end audio) Roon always delivers excellent sound quality .