The difference between an arranger keyboard and a workstation is nothing more than some additional accompaniment software. Workstations already have plenty of buttons to use when in arranger mode. I would like all workstations to have arranger features. There is no reason that they shouldn't. It would add little to their cost. Maybe some overlay button templates to use in arranger mode. Stand alone arranger keyboards should be taken over by workstations with arranger abilities. Then some people with workstations would realize how useful those arranger features are.