School.demo.moodle.net and demo.moodle.net have master sites into which changes can be made, for example to highlight new features of the latest version.
Currently for these changes to be added to the live site we have to ask for it to be done manually.
It would be good if the master sites could be synced daily with their live sites so that any changes are automatically added
I understand Matt started work on this a couple of years ago in this Demo site reset/upgrade document.