[GraemeJ]

I, sort of, understand your source's point of view, but I don't really go along with it.

The whole point of any form of music presentation is to tell the player what to play and when.  I see the 'what' in this display, but absolutley no indication of the 'when'.  OK, one could argue that a musician should be able to hear when a change is going to happen, but this format would be totally useless to anyone who was unfamiliar with the piece.

At the end of the day, I'm happy for anyone to use what suits them best, but I would never want to be presented with this format.  I'm not that fond of being given a standard chordpro file, but at least I can make some sense of one.  In fact, if I have the time, I usually re-write any chordpro file that's been given to me as a proper chord chart, as that is a far more accurate representation of what is played when.