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The problem is that the technical details about how the Sony software generates format data aren't known, so before generating it, someone would have to reverse-engineer the algorithm, which is a big piece of work for something that would mostly just save a minute or so at the start of each new book!
Also, it doesn't apply to ePubs, which is what Sony will switch to, so unless Sony publish the details, I don't expect to see it in calibre.
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