But if the composer would use a more geeky language, and talk about e.g. E7#9 chords, mixolydian modes and chromatic passages? How long would a layperson bother

But if the composer would use a more geeky language, and talk about e.g. E7#9 chords, mixolydian modes and chromatic passages? How long would a layperson bother to listen. (Well I used rock/jazz terms, since I am not familiar with classical music.)