I would miss having the fill buttons on a Korg. The great part about the korg fill button they could be used as an additional variation even an intro. You’re not confined to 1 bar, they can be programmed up to 32 bars long .

Did a lot of experimenting back with the pa800, medley styles with different time signatures for each variation, all sorts of weird stuff that could be done on a Korg . The fill buttons definitely played a role.