I find myself using the clipboard-erasure "defect" somewhat frequently to cut something to the clipboard, and then undoing the change and using the clipboard contents. And this is specifically useful in a way that merely copying isn't... but at the moment I can't remember why, or whether I use this when programming or working around InDesign's many defects.
- make a bunch of edits
- decide I don't like all of them
- copy the part I want to keep
- undo a bunch
- paste the good part
This is copy, not cut, but it wouldn't work if the clipboard state was part of the undo system.