No argument there... Yamaha's style collection is probably the largest. Of course, not ALL of them address the newer SA sounds or the latest Mega voices, but even so, it's a great collection.

Bad news, of course, is that you have to play them through a Yamaha for them to work! I despair of Yamaha ever getting the lead out and providing some seriously good kits (adding one or two doesn't really cut it, just about all of them other than the new Live Kits are pretty bland), and the audio loop styles are few and far between, and not all that well integrated, sound-wise into the styles.

But the good news is, there a ton of really good guitar playing on the BK's styles, and you can do mix and match fairly easily, so the mega voices aren't quite the impediment to translation they used to be...
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An arranger is just a tool. What matters is what you build with it..!