Digitalvision, Go work a single with your "Workstation". and handle request...how many can you pull off...The arranger keeps you in control..As for quality of sound verses Workstations..it doesn;t exist in today's market..
I have had all the workstations and many of the sounds are better on my arrangers..An example the Piano on the Triton[hip hop oriented keyboard] can't compare to the VA-7 piano...

Use what works for you,,but the synth workstation will never replace the arranger keyboard...

BTW what can you do on a "workstation" that we can't do on flagship arranger workstations?