That didn't happen on Android because while Android allows alternative app stores, it doesn't go out of its way to encourage users to them. So Google still has

That didn't happen on Android because while Android allows alternative app stores, it doesn't go out of its way to encourage users to them. So Google still has a lot of power via Play store user count. Sometimes, we get a good outcome because titanic companies' competing interests are balanced... but that doesn't mean we should forget that if that balance were upset the winner would screw over users in a nanosecond.