[josm-dev] multiple changesets

[MP]

>  Multiple changesets means that you can have multiple stacks at a time.

Basically, instead of opening another JOSM process you can just open
another layer and another changeset ... and of course, you can
continue opened changesets even after you quit JOSM for any reason
(either you need to update JOSM or its plugins to newer version, or it
gets killed by OOM killer, or whatever ...)

What about this:
"JOSM now supports editing in multiple changesets at once. If you want
to change something you notice while making other changes, you can now
upload it to different changeset."

Martin