I have always use the Registrations, is the most powerful and efficient way to get the most of the keyboard, you can "contour" them by using in one simple change of registration to trigger a fill/break, sync a Multipad either midi or audio link, change text, key, octave, parameters, effects, Voices, Style or style variation, tempo....etc.....

For either live performance in a gig, or for doing a Demonstration, the Best way to use the keyboard, of course, each one has their way on doing it.

I would not play an arranger any other way. Perhaps is because I came from the "Organ" school....remember all those tabs in the Theatre pipe organs?, but, you will see also those buttons between the keyboards, those are the "Registration" buttons equivalent, you could "program those" so instead of trying to make a 10-20-30 or more changes on real time, that for the amount of tabs would be literally impossible, with those "presets" you can, is the same on the keyboards now.

My 2 cents

Manuel