All accounts are now, by default, unified and those who were not were renamed and unified: T37707 and https://www.mediawiki.org/wiki/SUL_finalisation
As the goal we wanted to achieve is now achieved, I propose to archive the project.
I'll review the tasks left in the board and move out to other projects such as MediaWiki-extensions-CentralAuth or GlobalRename, but I'd also appreciate the help of @hoo or @Legoktm in this area.
Once the board is empty, I'll archive the project