I've been trying to. But one big roadblock is the need for all the call signs in Phabricator.
Some of our core work is now on Phabricator, but there are a number of sharp edges to cut yourself on when you make the switch and this holds back the wholesale switch from using Phabricator as a "Project Mangement, Bug Tracker, Wiki, etc, tool", to using it as "Source Code Hosting + Project Management + Bug Tracker, Wiki, etc." and getting all the extra integration benefits for our repos.
Most of these have future answers in the form of work currently on the drawing board by the devs. Waiting for the PEBKAC aka Nuance tools drives me nuts. They are great devs, but sometimes the slow pace of progress on some things hurts. CI tooling via Drydock & Harbourmaster has been in progress for at least 2 years now, Nuance has been in the wiki ahead of proper project creation for quite some time now too.
Really hope that the Launch of Phacility brings them the resources to speed up development.