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In a way, the dedicated e-reader is like a can opener. If the can opener was just invented, there would be a lot of can openers sold as people adopted the technology. But once everyone had a can opener, a lot less can openers would be sold. Except for people getting their first can opener, most can openers would be sold to people whose can openers were broken or lost. As long as a can opener does it's job, people don't need another. It's the same with e-readers, as long as the device still works, people aren't all that highly motivated to upgrade.
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