How to publish to multiple wordpress sites from a single install

An article with the above title was published in September 2013 by Chris Knowles.
The article provides extensive detail on how to accomplish this worthy objective - however the background on the central 'Push Syndication' widget looks shaky.

It would be great if someone could re-visit this topic to see if the results for this process are now proven. Is it working well? Has been any enhancements or effective alternatives released to achieve this goal?

https://premium.wpmudev.org/blog/how-to-publish-to-multiple-wordpress-sites-from-a-single-install/

cheers,

Rob