Linux is not on the rise lol.
People are locked in to iOS and Android. There is no appreciable number of people who would switch to another ecosystem and lose all their apps, purchases, etc.
More importantly, just like what killed Windows phone, developers won’t support a third platform, nor will customers move to a platform that doesn’t have the big apps that they need - many, if not most, of which are from Google themselves.
Like I said in another comment, unless they get tens of millions of actual unique-not-spam responses they will not even consider reconsidering. People aren’t going to de-google in any great numbers from this, because most of the people this will affect are already de-googled.