Increasingly, iPads, Mac notebooks and high end smartphones are turning into sealed units with few or no user-serviceable parts (for example, iFixit called the MacBook Pro with retina display "the least repairable laptop we've ever taken apart").
It's nothing new; getting into the original Mac required a large gadget called the case-cracking tool to lever apart the seam of the case, as well as a set of Torx screwdrivers, although Apple's new MacBook Pro takes this to extremes. There are reasons for sealed units that have to be professionally serviced, as well as good arguments against them.
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