IMO, it is helpful for training of large broken chords for the LH, managing compound sesquialtera, division of duties in the RH, playing in "difficult" keys, and above all it gives us the only(?) use of the term "affannato." :wink:
well, affannato means anguished. It fits the melody, but it's very difficult. The middle section relly did teaches something. I just can't tell what is it teaching. The part that have the left hand playing chords. But thanks for your opinion. I appreciated it