Bijiben is now "Notes". Collections appeared to replace old "tags" which were not consistent with other applications.
The selection mode had to evolve, too. Welcome to the new design pattern!
The preferences had a bit of UI change.
Why a "primary book" in preferences? Because there is now a first online notes support. Currently it only works with ownCloud, and assume you setup the ownCloud account into gnome-control-center.
Which means you can setup your private ownCloud or get an account.
This was the main work this release, sadly Google Keep has no API yet but I still hope to work on other services.
I’m glad the manual received some love.
Still a lot to code for the future, but GNOME is getting better every day!