The next level, is dynamic styles that respond to the way you are playing.... In a dynamic way, changing the arrangement when you play fast/slow arpegios/chords hard/silent.......
Ohhhh, I'm getting nostalgic ....

Technics had "Dynamic Accomp" feature and I loved it!
If I remember it correctly, it started at KN1000 and was gone at the KN5000...........