One printing feature that won me over to the ABC format is the ability to control the end-of-line break.
Most traditonal tunes that I play have parts consistiing of eight measure preceded by one or two introductory notes. I hate sequencing programs (including the one I use) that force a fixed number of measures per line. That means that any tune with introductory notes has its parts break in the middle of a line. All too frequently the tune ends in the middle of a line, too! 'Not visually intuitive, even if musically correct.
This frustration has resulted in my using one program for sequencing (multi-track arrangements) and a second one for printing the separate tracks for melody and harmony. Great results... but what a waste of time!