I absolutely love that realtime collaboration is now part of XD.
However, as someone who habitually saves their document quite often - when working on the same document (eg. a design system) my teams find that having to constantly 'accept changes' to the document when someone cmd + s to be disruptive to their workflow.
My humble suggestion (if possible) would be to somehow make it less intrusive to accept changes to the document. eg. a notification cue on the side away from the artboard (eg. XX has saved the document, refresh?), or automatically update the document whilst we work or eliminate accepting changes and be able to see in realtime edits to the document while we work.