Now that I've upgraded my iPhone SE to iOS 10 (version 10.0.2), the proactive app suggestions are gone.
What I mean by proactive app suggestions: in iOS 9, when I'd plug in my headphones or connect a bluetooth speaker, a small gray app icon would appear in the lower left of the lock screen or, in the app switcher, a gray app suggestion tab would appear along the bottom of the screen. This would usually be exactly the app I'd want to start using on my iPhone.
The proactive app suggestions feature was very handy. I wish it still existed in iOS 10. Is there a way to turn it back on?