BK-5 with 76 keys and some sliders...

Maybe Roland can reintroduce some of the great features lost in the transition from G70 to the BK series, but I have my doubts.

This is barely what you could call TOTL... MOTL is where it probably sits, at best. Not that there IS a TOTL Roland any more, and this won't be it. Even the keybed is the MOTL one.

G70 is still the zenith of Roland arranger quality...
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An arranger is just a tool. What matters is what you build with it..!