It's mostly the cost aspect of Korg's system that is its major practicality. Sure, you got two TOTL arrangers hanging around or $8000+ to buy two, kudos..!

But back in the real world, if ONE arranger can pull off this trick (and Korg have shown they can!) that's a boatload of money saved 💵💵💵😎🎹🎹🎹

While having two different soundsets is nice, it's not that important if your arranger already has a great comprehensive set already (which all the TOTL arrangers do). All you need to do is mess with the header if you're running two different guitar parts (e.g.) to ensure they're different (if needed).

The feature is in its infancy. One thing that will expand its functionality will be to allow each variation to have a different combination of Part Mutes (currently it's one per style combo). Another way it can be made more musical will be to deliberately write dual styles with subtle differences and then either randomly or deliberately (a footswitch command to move from one to the other style and back would work) change them. THAT is the end of the rigid 'four variations/four fills' box that most arrangers force you into.

For many genres, especially jazz, four variations is simply not enough. You can make it work, but it's a shadow of what real musicians would do! Two VERY similar styles allowed to be jumped between is a lot closer to reality. It would also allow things like halftime and doubletime variations without leaving you only two 'normal time' variations.

The potential of the idea has been barely scratched. And I'm not sure Korg recognize it. Ketron should jump in!

My views on audio styles are well known. Chord choice restrictions and complete lack of editability make them of limited use. I always felt the best use of them was drum and percussion loops. No chord restrictions!

In terms of the variety and choice of styles, 'two at a time' style play vastly expands your choices. 'One at a time' no matter how sonically realistic the audio parts are cannot come close, and no extra $4000 arranger will be able to leverage the potential of the idea without vast complexity setting both arrangers up so that selection of both styles, the muting of unwanted parts, and the selection of which intro/endings/break fills get used is automatic and stored as a single registration.

Audio styles are wonderful for the 'preset player' home musician (and I'm aware that that's probably the majority!) but for the pro and advanced amateur, the 'two style player' offers a massive advantage in diversity of styles, and with a repertoire of hundreds of songs in a particular genre or two (or three!) is the answer to HAVING to use the exact same style over and over again.

It is dismaying that only as the arranger market contracts and fewer and fewer new arrangers are designed does the answer to style fatigue finally appear, and only on ONE very troubled design of arranger.

I've been waiting for this for decades!