If I recall correctly I thought when real tracks first came out it used midi to trigger sampled instruments, therefore having the best of both worlds. I cant understand how real tracks can work without midi, yet still use the chords I am inputting unless they are using pre-recorded chord progressions and have every possible progression recorded..
I usually export midi to reason, or ableton live and between the two using top end sampled instruments and synths, and then from there I can modulate perimeters that can never be done with audio, and midi also has a much larger range of dynamics which is great for live performance... Audio dynamic range is limited giving more of a karaoke experience rather than the impression of an actual band or band members, and you cant edit anything with audio for the most part its a take it or shove it as it is.. LoL