The thing that really ticked me off about the G70 was that it had something VERY much like the Korg Guitar Mode. It automatically voiced guitar chords for correct notes, and would also move up or down the neck, depending on where in the Chord Recognition area you played the chord. Amazing...! It would do fast strums, up and down, slow strums, picking patterns, thumps, squeaks, you name it.
But they forgot to finish it! It ended up being a realtime feature only. Unlike Korg, they never set the arranger section up so you could use it as part of a style. You could ONLY play it in realtime, or record it into an SMF.
Facepalm..!
I think part of the problem was that it needed a 'guide' track - the notes other than the chord that determined whether you got an upstroke, downstroke, choke, etc.. Problem back then was, Roland's could only have ONE 'drum Track' in a style. A non-transposing track. Because if you change key, transpose, etc., you don't want those 'trigger notes' to move, or you'd get an upstroke when there should be a choke, etc..
Thing is, modern Roland's CAN have multiple Drum Tracks. The very thing that was needed to make the feature work is now a standard part of the OS.
But where did the Guitar Mode go to?
Sometimes, I think Roland use their arranger division as a place to banish their most incompetent designers to, if they can't fire them! The list of
dropped great features is longer than the current list of them...