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Nit:

> One example of a future looking architecture decision is how different applications can flow back and forth between each other.

I think you mean "...how data from different applications..." or something.

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I actually really meant this from a UI perspective where the _screens_ from different applications can flow back and forth between each other. But data is an equally important point to bring up.

There's a negative aspect to the multi app ui history model as well though in that its easy to create confusing app launch and back button behaviors. Example: if I jump from my app to the browser then hit home then later relaunch the app and I'm confused because I start in the browser.

Having the ui stack capability across apps is great but as a developer it requires some extra effort to avoid confusing incidents like this for users.

> Example: if I jump from my app to the browser then hit home then later relaunch the app and I'm confused because I start in the browser.

As an Android developer and a long time Android phone user, I have to say that this can _never_ happen. Do you have a real example?

Hmm.. you are right I've imagined this behavior. I could've sworn I'd seen this happen a number of times but looking back now I'm not seeing it.

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