"I think the "arranger" keyboard has become a crutch for so many...causing them to lose skills that they may have had before...and others do need the arranger to aid them because of lacking skills.."
I've stated a while back that I am glad I got rid of my arrangers (at least temporarily anyway) and bought a true workstation because it made me focus on my playing skills more, instead of using the auto-accompaniment features of arrangers. I started playing arrangers from the get go and by switching to a workstation it has opened up new ways to concentrate solely on my playing skills and of using proper fingering methods plus more in depth music theory development and research.
OTOH, I would like to get another arranger fairly soon to use in conjunction with my Fantom G7.

In a two tier situation that is.
All the best,
Mike