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There really is no need to have 15 million individual copies of Abbey Road (the best-selling LP of both 1969 and 2011) in the Cloud. All owners could share one cloud-based copy. Instead of storing our personal libraries, the Cloud would merely have to provide a CD-quality (or higher) digital copy of the collective holdings of 15 million listeners.
— From this article on the idea of access vs. ownership in the digital age.