More cores != better usable specs.
If you prefer security and privacy, there's a strong case for iOS.
If you prefer day-of-release software updates, there's a strong case for iOS.
If you prefer robust photography solutions, there's a strong case for Apple's camera hardware and software.
If you want to create audio, there's a strong case for the low latency of Apple's stack.
Android phones equivalent to the price of an iPhone have higher resolution screens, more storage and RAM.
Android phones half the price of the iPhone have equivalent screens, storage and RAM.
I have Nexus devices so I get day-of-release software updates (even my Nexus 7 2012 is running 5.1.1)
I couldn't care less about photography solutions or audio so that really doesn't apply.
Privacy, agreed, Android is a data hoover out the box.
That said, it has been less than 4 years since the iPhone 4S was released; they shouldn't be failing yet, and that reflects poorly on the iPhone (as well as iOS) in your case. However, I'm also not yet convinced that the Nexus 5 will be operating well in late 2017 - that's yet to be determined.