OSMCha shows a helpful summary of tag modifications:
In the above changeset I intended to only annotate sidewalks, but during the editing process in JOSM somehow I accidentally copied and pasted all tags from one street onto many others. If JOSM showed this kind of summary I could have easily caught the mistake before uploading.
Is there any way see this information in JOSM, aside from tediously opening the History window for each of potentially hundreds of objects?