The reason we don't have ePub 3 yet is because of all the multimedia garbage tossed into the spec. Most devices running ADE are eink devices and are not going to work well with all that multimedia garbage. Most people just want to read. ePub 3 would mean a lot of eBooks would be apps and not actual books. What we really need is to take ePub 3, remove all the mutimedia/javascript stuff, put in what works and come out with an ePub 2.5 while dumping ePub 3.
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