[rolltiide]

> After this announcement, I would just remove "sign in with Google" as an option, and force all my users who previously used "sign in with Google" to set a password.

Okay, you do that. That's not a punishment to Apple, you might bounce some of your own users and is a choice you made exclusively.

> You can have only Apple sign in, but not only $competitor sign in.

If that's the antitrust argument, they just need to reword it say "and include another signin method" or logged out functionality. I just don't think thats a strong enough argument, as they aren't removing choice in any way only adding it, except to people with existing apps - like you - who will risk decimating all their own users.