being able to navigate around a mini version of the photos app, from within a share/upload screen of another app, isnt a benefit you would think of until youve tried it.
Thats just an example though. Current Apple will never treat non-Apple apps with the same kind of integration. Messaging apps, photo apps, map apps, music apps, movie apps. It will never be the same as a place with choice.
"Hey google, gift mum a copy of Almost Famous." (google remembers that my mom likes text messages, and has vudu.)
"Hey google, gift dad a copy of Key Largo." (google remembers my dad likes facebook messages, and has prime.)
Send me a message when Apple starts being friendly to competitors. iOS is a glorified app launcher if you are not a heavy Apple Services user, and Apple Services are substandard. Even iMessage only works from Apple hardware. Useless.
I am being a little silly here, Google and Microsoft are moving TOWARDS Apple-Like ecosystem lock-in, whereas Alexa/Prime and Roku are the more vendor agnostic shells.