He stated what would be RECOGNIZED... not what would actually play.

Look, it's simple. Each style needs three audio loops to cover the three different tempo ranges they cover. Then they need 12 different versions of each tempo range for all twelve keys (unless there is some realtime pitch transposing, which hasn't been mentioned), then they need at least the major chord types (maj, min. dim, sus4 and aug). Now that is 180 loops.

But add in 7ths, maj7ths, 6ths, 6/9's, dim6ths, half dims, 7b10 (or #9's if you prefer!), sus4's, and so on and so forth, and you are talking a MASSIVE amount of loops that need to be loaded up for each style, or if they stream in realtime (hard to imagine this without at least preloading the first part of the loop), at least a MASSIVE number of different loops that need to be recorded (and this is going to effect cost and availability).

And this is just for ONE variation... multiply it by four if the audio part changes between variations (one would hope this!), and you start to see the problem...

If simple basic chords are all you need or expect from the guitar part, this should not be a problem. But when Yamaha and Korg manage quite complex guitar playing very realistically and yet STILL don't restrict your chord choices, at least to me it seems obvious which is the technology of the future and the present.

Loops provide a great shortcut to sonic bliss on the guitar part, but it comes at a price. What that price is, I have yet to be informed. But put it this way... I certainly NEVER get a 'you REALLY don't need me to play that chord' comment from any REAL guitarist when asked to play a Min(maj7) chord.
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An arranger is just a tool. What matters is what you build with it..!