Why NOT pick on Apple here?! There the most successful tablet manufacturer pretty much leading the direction of industry. Why are you so interested in deflecting their blame? Why do you think it's ok if others do it to?
All hardware products will suffer tradeoffs, and I don't necessarily find it reasonable to think that tablet computers should always be hardware-upgradeable, if it is at the expense of handle-ablity. The author's lament is that the iPad went obsolete before it broke. The PlayBook went obsolete nearly as soon as it was released. How did those Galaxy Tab 2s do? If the problem is that "it went obsolete before it broke", that's infinitely better than "it broke before it went obsolete".
I'm not saying Android is great here, I think it's a terrible system, but it's not nearly as artificially hampered as Apple's stuff is.