iOS 9 marks the first iOS release where my thought has been a pretty consistent "Well, I guess Apple's jumped the shark." Most of the reviews I've read of iOS 9 have apparently been written by sycophantic Apple fanboys who don't actually use their phones to do...
software
Here are articles on software
Ignore that software upgrade notice … for now
A software upgrade notice is more than a convenience; it changes what you’re doing. Don’t treat an upgrade notice as urgent; treat it as a task instead.