Because although it had so many pluses...that didn't out weight what was more important for MY needs after using it on stage for 6 months I started to realize that KORG'S annoying "folder loading" antiquated PA style OS and lack of usable style support just couldn't get the job done for my needs. What the Yamaha S910 has the Korg doesn't, you just cant have it all so you choose the workaround that serves you better. I hope things change in the future.I not brand loyal ....but I am what works FOR ME on stage loyal. If you have anymore question I'd be glad to accommodate you Lee.