Are the any plans to reimplement this, and, regardless, is there any better way to do this than noting down which MIDI files are in the playlist and copying them from the interchange folder?
It was implemented and then cancelled because it wasn’t possible to keep up with changes to the session file format at that time. There are no current plans to bring it back, although it would be a good idea. Just not high enough on the priority list at this point in time.