An anonymous reader writes "Apple's new Retina MacBook Pro is essentially completely non-upgradable, a sealed-box, following a trend started with the MacBook Air in 2008. It's a given that hardware companies are in the business of selling hardware, and would love for computers to have iPhone-like replacement cycles of 1-3 years. But does this mean we're moving irresistibly into an era of 'sealed-unit computing,' even for power users?"
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