When at last it was revealed what Mahler’s final intentions were regarding the ordering of the inner movements of his 6th Symphony, 90 years of theory, history, & performance practice went right out the window. For theorists, it altered the harmonic structure of Mahler’s A minor Symphony. For historians, it modified the meaning of Mahler’s “Tragic” Symphony. For players & conductors, it changed the musical progress of Mahler’s 6th Symphony. For listeners, it made Mahler’s deepest & darkest symphony even deeper & darker. With the achingly nostalgic Andante moderato now coming before the bitingly bitter Scherzo, the triumph of the opening Allegro energico sounds even more hollow & empty & the collapse of the closing Allegro moderato sounds even more final & total.