What me! Upgrade?
And there we have it. 2 iPads in this family, an iPad2, still going strong and an Air2. Needless to say, the iPad2 was "handed down" the family tree. (the one Android tablet I had was consigned to the dustbin almost instantly - it was truly horrible)
The issue for tablet sales is the upgrade cycle. We long ago passed the point where there were compelling reasons to upgrade every couple of years. The use cases haven't changed much, and I hadn't noticed too many apps that "required" me to upgrade before I did so for other reasons.
I guess everyone who wants one has one, and the upgrade cycle is about 4-5 years (or accidental destruction) whichever comes first.
Still, USD 4B in quarterly sales (for Apple) is hardly a failure, so I don't think they are all that concerned at this point.