Seems you are incapable of simply sticking to the point, Ian. This has NOTHING whatsoever to do with Roland. Roland have ceased production on ALL arrangers except BOTL 61's. If they were still producing MOTL and TOTL 61's, you'd have a point, but sadly, you DON'T.
I've played an NP-30, Ian. That has about as pianistic a feel as an S910! In other words, none!
Every single arranger manufacturer still making MOTL and TOTL arrangers except Yamaha are making 76's. Stick to the point.
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An arranger is just a tool. What matters is what you build with it..!