I believe the other companies aren't embracing full audio styles is because the design still has flaws...consider Ketron's need to substitute midi sounds for audio sounds when it comes to complex chords, and even after 6 years they still haven't figured out a way to get beyond this problem.

I think Yamaha is just dipping their toe in the water with their implementation of audio drum based styles...perhaps they'll continue with more of the same, or perhaps, like other features they brought out years ago (like Virtual Arranger Styles, and Interactive Accompaniment to name only two) they will be dropped.

Ian