Bring back the legacy sign‑in method with separate Internet Identity anchors

Everyone is now forced to use II 2.0, though it’s not addressed that:

  1. OAuth is less secure and less private, and passkeys are not harder to use, OAuth is just more familiar. I don’t see why adding it, especially since I didn’t see the community asking for it. For marketing and attracting new users? Frankly, it seems that II 2.0 didn’t attract many new people and just created unrest in the community.
  2. No way to opt out of OAuth in II 2.0 for developers or for users to disable it as auth method for their II account: it lowers the minimal security level for apps without giving developers control over it or providing an alternative. I remember concerns that giving developers such control might give information about what people use for auth, but it seems to me that introducing OAuth itself created a possibility of such a problem existing, and it seems strange to see that this argument was used in a discussion about concerns about lowering security by introducing OAuth and giving back the higher security options for auth by only using passkeys