Who knows if iOS was really the problem or if that was just spin? How about "you're holding it wrong". Was everyone with that issue just holding it wrong or was that just spin rather than Apple getting it right?
Maybe something crucial in that app was lost in the change to iOS7. Maybe not. But still, a mapping competitor app dies. Horray! Why can't all competitors die so that we can all get as lost as I do sometimes following Apple's Map app.
I don't know. But Google doesn't seem to have a problem with iOS 7. Nor does any other app that I use on a regular basis. If other developers can work with with iOS, why can't Nokia?