It’s possible to hide a rem while some of it’s descendants are visible: they become like a grayed out breadcrumb.
I don’t know if this generalizes and one can, with work, set up any rem to be shown or hidden. If that’s the case, it would be cool to have a shortcut that hides only the selected rem. If not, it still would be cool to have some command that lets us have finer control over what is possible. Such as one that hides the parents but not siblings, or something.