I did not post it to diminish your work, just to update Polyglot.

Personally I’ve used overpass-turbo to remote control and import data into JOSM, which worked marvelously, as long as the metadata is included. My guess is that this will continue to work with your update to overpass api, so the need to duplicate this functionality in JOSM is weak.

https://josm.openstreetmap.de/wiki/Help/Menu/GPXLayer

@Polyglot: JOSM does support this for a long time, although the online help spares out a separate page about the download action.