I sort of miss the days when the first organ 'arrangers' had just a handful of drum beats. Then they came out with automatic bass. Over the years they evolved into the predecessors of what we know today as arrangers.
One of the best days of my life was when I was able to sell my last organ and go to several components that freed me from hauling that beast around!
As I recall, that first setup consisted of a Yamaha PSR 70, midied to a drum machine and a DX 7 for lead sounds.
All the PSR did was generate the tempo and bass line.
Things were a lot more simple as far as arrangements.
Do I really miss those days? NOOOOOO!