I just spoke with the product manager for Yamaha and got some answers about the MM6.
Yes, you can play fingered chords and trigger up to 8 style tracks. And , if you like, you can record these chord changes and record these 8 tracks and in addition, one more track can be added (melody). The styles are preset and you would play in the split mode to play the chord changes in the left hand. Now, I can't wait for mine to arrive!
George Kaye
Kaye's Music Scene
Reseda, California
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George Kaye
Kaye's Music Scene (Closed after 51 years)
West Hills, California
(Retired 2021)