Well, it is a handy functionality, but it should be mentioned that a viewport (in a layout) is automatically set to 2D Wireframe if the comparison is active and a change in an Xref is detected (at least on my 2022 installation). At first, I thought this is a bug (I didn't even know xcompare), my viewport always switched to 2D after changing an Xref and reloading it. Maybe there is a Sysvar for this, too ?
Or, since I generally do not work with revision clouds et al in Acad and therefore don't know them in-depht, maybe they need 2D WF mode for being displayed ?
EDIT: Sorry, I forgot to make this a reply to @AllenJessup