What is your opinion on token response type and/or id_token for oidc being part of the fragment of redirect uri? I have noticed that apple only supports "code" response type, which is the most secure way. Downside is that it requires a back channel and a second request to be made, but i cannot imagine a use case where this would be a problem as I don't see a pure Single-Page Application having any use for this in a any way, except purely rendering some protected data in a different format, which seems like a silly use case.