| B | ↘ | C | SessionsController got worse |
| ⇢ | A | SessionsController.switch_account_to_local() added | |
| ⇢ | A | Authenticator.auth_changed_to_local? added | |
| ⇢ | A | Authenticator.auth_changed_to_social? added | |
| ⇢ | A | SessionsController.switch_account_to_social() added | |
| D | ↘ | F | SessionsController.process_signin() got worse |
| B | ↘ | C | SessionsController.create() got worse |