Creating a user styles from a midi is not the same as starting with a blank canvas.., and entering in the parts yourself. Sure you could create your own midi.., then use the software to convert that to a style, but it's really not the same as starting with a blank canvas and creating all the intros, ending, and variations.

Ocamins decision on the GW and the M50 are his own. It's also not uncommon for someone to move from an arranger to the synth.., it just depends on one's needs really....