It's everyone else v Google and/or Apple.
Ironically, forcing this onto Google might be the best thing for Android, as it's the openness the platform really needed to compete against Apple, but costs Google too much revenue to ever do it if left to their own decision.
It’s hard to believe the best way to compete with Apple is by being more open then they are.
If that worked, we would all be running some unix os on our phones.
It’s clearly an utterly false premise.
This is going to hurt google and do literally nothing to Apple, except perhaps scare some people into the “saftey” of its curated ecosystem.
iOS is based on Darwin which is BSD based, and Android is based on Linux, which is heavily inspired by Unix.
So technically, we are "all running some unix os on our phones"... perhaps you mean some open-source OS? Even then, Android markets itself as being open-source (although I imagine they must add some closed source stuff on top of it).
Android Studio doesn't run on Android. XCode IDE doesn't run on iOS.
XCode IDE requires an MacOS device. Android Studio works on Win/Mac/Linux/Chromebook_with_containers.
Android Studio runs in a Linux container. XCode only runs on MacOS.
Apple does not allow, and per a recent ruling, and DOES NOT HAVE TO allow 3rd party app stores.
(There are already 3rd party app "stores" for Android like FDroid.)
Android already allows, and per a recent ruling, MUST allow 3rd party app stores.
In terms of Application stores, (after trying to trademark the phrase "app store" to anticompete Amazon) Apple gets protectionism for their walled garden, and Android may not have a walled garden.
Apple built a new language called Swift.
The Java pitch was "write once, run anywhere" because you port the JVM, and J2ME.
Google rewrote many parts of the Java stack.
Google ported to Apache Harmony/ OpenJDK to port away from Sun then Oracle Java.
Google built a language called Kotlin.
Swift runs on MacOS, iOS, and Android.
Kotlin runs on Android/iOS/Win/Mac/Linux/JS. Dart lang also runs on any platform. Flutter also runs on any platform.
Apple inherently never sent these emails. There’s no deals they made because they were closed from the get go.
Google created a market of “android app distribution”, and then put its thumb on the scales so it always wins. That is why Google lost and Apple didn’t lose (as much).
but the non-partisan bailey answer is along the lines of "android promised freedom, IOS never did".