They say Schoenberg pushed tonality to its limits, but to me there's so much ground to be explored harmonically and rhythmically way past Debussy and others, and way past tonality in general. How's abstract not musical? Think of extending Bach's complex counterpoint with AI; think of moving away from discreteness; think of adding technical extensions to every instrument of the orchestra in order to create new possibilities of sound; think of going past the 12 notes. Looking at it this way, Debussy is also very restricted in terms of depth and in terms of notes on and between the lines.