Archive Team are 59% through their stretch goal of archiving G+ Communities
"Googleplus2" a/k/a G2 is a project to archive all public G+ community content. This was a "stretch" goal of the Google+ archiving project.
The tracker here shows the full project, there are 81,270 or so work sets of 100 communities, and as of a few moments ago, the project was at 59% complete, with about 6 hours left to run at present rates.
The contents should appear at the Internet Archive in about a month or so, it'll take time to move it all there.
Tracker status below:https://tracker.archiveteam.org/googleplus2/