I recently checked out the source code of JOSM.
Saw that it is based on ANT. I totally understand what the original reason was (because JOSM is a quite mature project and ant was THE thing back then).
But what are your thoughts on moving to an more modern build tool like gradle?
I think that it’s extremely unlikely that anyone involved with JOSM development will read this here - you’re probably better off trying to reach out to the JOSM developers directly.