Tablets are content consumption devices first, and productivity devices second. I love my iPad, but I see very little reason to upgrade it considering its perfectly suitable for reading books, browsing the web and watching the occasional movie / show on Amazon video, Fios etc... I am also very jaded by how much performance degrades with every iOS update and refuse to get caught up in the "upgrade every year" Apple cy…
I haven't noticed any of this ever, except in the cases of bugs (stealing cpu for some apps etc) that eventually get corrected. And I update my iPad the first day any new OS version comes out.
I even still use my 2nd gen iPad update to the brim.