This Ralph Maten has made it clear more than once that he actually frowns on orchestral sounds. From that moment on all my interest in this Casio instrument has disappeared, as it was clear enough to me that the EDM focus is not my cup of tea.
I downloaded the MZ-X500 Appendix document from the Casio web site. It lists all the tones, rhythms, and other presets inside. It does list more modern stuff, true, but for the most part I see what you usually find in arranger keyboards: Lots of pop, rock, R&B, disco, jazz, Latin, ballroom, etc. Because, you know, EDM. ;-)
Did you listen the demo, one needs to admit that those strings certainly sounded good...
Ralph prommised me that he would show the typicall arranger capabillities with typicall arranger sounds and typicall arranger styles in another upcomming demo...
PS. People who dismiss (or dump on) Casio stuff before even trying it are looking increasingly shrill nowadays.