Yes, meeting rooms in Arthur are persistent. This means there is no need to save the changes made to the room (e.g. content on whiteboards, text labels, room design, imported files) because they will be automatically saved. You will be able to continue your work whenever you return to your rooms. Rooms in Arthur are also accessible anytime and from anywhere, giving you the ultimate freedom for virtual collaboration.
Exception:
The only exception right now is your personal notebook, which is not persistent. You need to export your personal notes before you leave the meeting room.
For more information, look at Do my notes stay in my personal notebook after leaving a VR meeting?