I am very "anti-Raspberry Pi" because I am annoyed by how many project seems to use it "For the sake of using one".
Additionally, since the supply-chain issues regarding silicon chips a couple years ago, RPi are now much harder to find than they used to be.
In past times, one could visit an electronics store and find bins stuffed full of RPi.
Now the stock is inconsistent and goes as fast as it is restocked.
Sure if you have a RPi, use it, but there are many other devices which do the same job, while consuming very little power.
So there's no need for people to obsess over "it must be a RPi"
For example you can use an old wifi router with USB ports or a "thin client" type PC, or even a wide number of devices which are clones of Raspberry Pi's.
Refer to my post here about how I turned a $10 "N" Wifi router with a USB port into a MPD based streaming player ->
https://www.audiosciencereview.com/forum/index.php?threads/relocating-the-pc.27476/post-1160920
So would a HiFiBerry DAC with Raspberry Pi 4B give you actual 24bit 192Hz streaming for Roon? Looking for something Roon ready for a Denon receiver.
I don't know what Roon is, never heard it but I also don't stream.
There are lots of Hifiberry models, don't know which one you're thinking of, as long as your source stream is 24 bit 192khz then any dac with those specs will work...
You know you could simply use a mobile phone, like some old iPhone or Android, connect that to an OTG cable to any Class Compliant DAC with 24bit 192khz specs or better, and just run that into your receiver?