Most of the stuff that Phabricator was used at our company is now done in (self-hosted) Gitlab. I think the only thing that's still actively there is credential management, and I can only imagine there are better solutions for that than Phabricator.
It started that way for sure, but we’ve evolved with boards, milestones, epics, swim lanes, burn down charts and a lot more.
We have a whole group in our engineering and product org focused on making it even better: https://about.gitlab.com/direction/plan/