They sure are more flexible, I imagine, but lets say you want to change a pesky Am7 to a F#m7b5...just because you feel it sounds better.

You could punch in and record all the parts, but how many will be able to do that, or how many will bother?

I still love the control of being able to choose my own chords, or my own style/arrangement of a tune seconds before I play it, or even change a style half way through a piece...

SMF are probably perfect for many people, but not everyone needs, or wants, to use them.

Ian