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They already have required it since 2021.

https://support.google.com/googleplay/android-developer/answ...

The main benefits is that Google is able to optimize downloads for individual devices. It also makes the situation where the developer loses a private key and then they can no longer push anymore updates to their app no longer possible. I'm not a fan of this approach of essentially allowing Google free reign to use your key for deploying jpdates.

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> The main benefits is that Google is able to optimize downloads for individual devices.

I don't think Google does the more invasive bit of stripping out non-applicable code protected by API level checks (Build.VERSION.SDK_INT), and otherwise, the simple splitting up of native libraries by ABI, graphics resources by display density and string resources by language (plus any additionally defined code modules for on-demand download of optional features) could have been done wholly locally, too, including signing.

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