I don't think anyone was "scared away" from updating because of the issues that "plagued" iOS 8. Most people don't read MacRumors.
It's most likely because they don't have enough space to update. iOS 7 was more scary for people since normal people were talking about it.
It's most likely because they don't have enough space to update. iOS 7 was more scary for people since normal people were talking about it.