There's purity, honesty and heart left in any genre... Thing is, we're talking about a band that achieved incredible success. Worldwide success. I see no more 'purity' in commercial jazz, or commercial country, or commercial Classical. They are all doing it for exactly the same reason that U2 are...

In fact, if you consider that U2 aren't even breaking even on the tour, yet, that shows a LOT more 'purity' than many others. How many jazz stars, or classical stars, or country stars will keep a tour going on that scale (or any, really ) if it doesn't make them some money PRONTO..?

Looks to me like U2 like playing more than they like money... that's pretty 'pure' in MY book...
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An arranger is just a tool. What matters is what you build with it..!