Don’t confuse an Intel NUC with Roon’s Nucleus. SonicTransporter is a different story. So in total, talking about three machines.
Roon’s Nucleus runs Roon’s OS, ROCK, and can run only Roon.
As I stated above, an Intel NUC with WIN10 can run any Windows programs you want.
I can’t hear the fan on my NUCs from 6 inches away.
This business about NUCs getting dust on the fan is a bunch of hooey. You don’t need a fanless case.
For example, here’s what I have -
i5 NUC -
i3 NUC -
Most happy with setup, for Roon core and to use JShiver (or Plex or Kodi) to watch 4K movies.
Putting the NUC together involves removing 4 case screws and top, plugging in the RAM modules (they only go in one way), plugging in an M.2, and installing WIN10. The hardest part is dealing with the sub-microscopic screw that holds in the M.2.