My NUC7i3BNK roon core/bridge has been running for 2 years without a glitch now.
The Rasperry Pi 4 did not exist at that time so I have no idea if that could work. Back then I had tried RPi and Vero 4K as Roon Bridge (they both have CEC wich is pretty cool) and none was working well enough (especially for multichannel files). (I happen to have one RPi4 now so I could run some tests…)