Ok, so my last post was more or less me thinking out loud, but I think I’m actually on to something here. I believe the disconnect tool really is intended to be used on points as well as polygons.
I was thinking maybe my earlier success was based on having a polygon selected and running the command, even when not in polygon mode. Maybe discconnect isn’t so much “mode dependent” as other tools (despite not working on points or edges), that it simply used whatever polygon selection was active (no matter what mode you’re in) and running it on that selection regardless of the currently active element mode.
Turns out I’m right! However, the plot thickens;) If you don’t have any points selected the disconnect tool is grayed out in point mode, meaning that it is (or was) indeed intended to work in points mode, on points. There would be absolutely no valid reason to deactivate the command based a on a selection of a type that’s not supported by the tool. If it was all about poly’s and could be fired in any element mode, then it shouldn’t care about any other selection type except for polygons;)
So I think I have it spot on: the disconnect tool is (or was, at one point in time) intended to also be used in point mode, on points, but this functionality is broken and the help docs have been edited to omit this and instead proclaim that it’s only intended to work on polygons… or they just did a poor job cleaning up after their attempt to make it work on points;)