Not for me. You never know when you might have to adjust something. On a busy stage in the heat of the moment, the last thing I want is to have to do precision drawing with my finger. I need everything to be accessible with a knob or a button. They're just steadier, more reliable, and more forgiving.2nd is knobs of any kind. Should be 100% touch screen in this day and age.
Not to mention that a splash of beer can render a touch screen useless. Or even worse, give it a mind of its own — and make it start doinng things that I don't want it to do.