Actually, Korg is the ONLY arranger that still has fill buttons, and that is on the 4x.
Don (or anyone), is this "fake news" or "factual news?" I looked at the PA4x. Yes there are fill buttons there. But none on the PA1000. "Fill buttons" are my life support. I play them as much as I play the rhythm.
You're saying most keyboards come out now with "auto-fill?" If so, this is a major game-changer for me!