Here is the thing. If 99.99 percent of �arranger� players can not operate an electronic musical instruments and require everything to be made for them exactly how they need it OOTB, then an open arranger is not for them period.
And, not even a closed arranger is for them because I don�t know that a closed arranger meets everyone of the 99.99 percent of that population.

The open arranger/workstation is the next progressive step in keyboard technology. You want arrangers to attract more younger persons. You want arrangers to handle more modern music? Then an open arranger is the logical step to accomplishing those task.
Modern players are accustomed to using Loop based programs, VSTs and mixing and matching thing. That is the market for open arrangers. Or and by the way, to beauty of an open arranger is that it is not just an open arranger.

An open Arranger/workstation gives the user the chance to have a Motif xs and a T3 in one.