personally I'm against that login too unless there's a BIG & PHAT DISCLAIMER that if the used #Apple account gets locked/bricked/deleted it'll prevent logins at all, making one dependant on it!
- Just like #Mastodon also warns people: 'Your DMs ain't encrypted. Admins and moderators can read them!'
Personally, I think there's NEVER an excuse not to implement username (or at worst: eMail) + Password as primary & mandatory login.
- Espechally since Apple can (and will if they feel like doing so) brick the *"Sign in with Apple" functionality at any time with neither warning nor grace period nor appeals!