There's a growing number of people for whom HMV didn't sell the product they wanted. The retailer might have accounted for 40% of physical sales but they didn't want physical items. They wanted data. No matter how cheaply HMV sold it, it wasn't what they wanted.
It was my recent trip to New York that brought it home to me. Walking around this most fraught and amazing city I tried to find somewhere to buy a CD from an American singer I like called Greg Laswell. But not one place could I find and on asking waiters and the concierge they couldn't help either.