The one negative I see is that the arranger keyboard will take the place of other musicians.
The arranger might sound better, but the other muscians lose their chance to serve.
John C.
True but there’s no reasons you can’t play arranger keyboards with other musicians too. I play with percussionist, guitarist, violin, horn players, vibes, steal drums, even bassist and drum set players.
You can always mute parts or just play manually ( no auto accompaniment) if you prefer.