Editing sounds is the least of it. Modern hiphop and techno musics revolve around arpeggiators. And they are VERY different to styles. Styles try to analyze what you play. Arpeggiators just play whatever you play, and don't mess with the notes.

Plus, the Korg PA series is based on a ten year old (or older) set of samples. Sure, it's a Triton, to a certain extent, but even Korg have moved on. How about a PA with an M3 engine? Karma, modern hiphop drums, that sort of thing...

That would wake up the US market to arrangers! DJX was a great product. Amnesia is a terrible thing for a company to have...