@Geoff_Coupe nailed it… putting in that feature is counter to the “appliance” nature of the device. You shouldn’t be checking the temperature. It should be good and never go bad. This is our opinion on what we think ROCK should be. We aren’t right, nor are we wrong. It’s just our opinion of how things should work.
Also note, this is not true of all installs. Many installs may require temperature monitoring. For those installs, you can use RoonServer with any other Linux distribution which are far more flexible and far less opinionated.