Having come from a JIRA/Github/Confluence setup in my previous role to a Phabricator setup in my current role, I can't believe I'm saying this but I'd give anything to have JIRA back.
Would you like to elaborate? I haven't properly used Phabricator yet, but have so far had no problem (maybe even a bit of joy) browsing https://phabricator.kde.org/
I've found that phabricator seems to lack support for more complicated workflows so you end up having to hack together things using tags/workboards/milestones to mirror how your process works. This could be a positive though if you've suffered through really crappily configured JIRA projects.
To phab's credit, the web UX of phab is more respectful than JIRA (10 second load times anyone? constantly (re)moving things) but I've used go-jira[1] for the past 2 years to great effect and there's simply no equivalent of that for phab.
It could also be that I'm just stuck in my habits and don't like change - or the way my current orgs phab install is configured (I've never been a JIRA or phab administrator so I don't have much insight here)
