I'm going to stop using Sign in with Apple for anything other than throw-away accounts, and revert existing accounts to whatever password/email option is available.

Apple's implementation of account services is nowhere near good enough to justify their presence as the sole arbiter of anybody's identity. If at any point I decide to cut massively down on the web, and consequently a number of accounts, and I just want to use the best single-sign-on option then I'll go with whatever behemoth tech company does it best; right now that is Google, as far as I can tell.