Of course it's going to shed users if it goes from being the default app to competing with the owner of the ecosystem. No one expected Google to win any more t

Of course it's going to shed users if it goes from being the default app to competing with the owner of the ecosystem. No one expected Google to win any more than people expected Netscape to win when Microsoft decided to make a browser, because Microsoft can control the default. Once they allowed other browsers to usurp the default position (thanks, Justice Department!), the browser wars were back on. Unfortunately, Apple is so far from a monopoly that iPhone users will never have the ability to choose their default maps, mail, calendar, camera, phone or music app.