We moved from Phabricator to JIRA, Github and CircleCI. We couldn't be happier. It's one thing to have a single tool with 70% of the functionality you need, it's another to have 90%+. That 20% makes such a huge gulf it's not even funny. We were able to ditch several thousands of lines of cobbled together glue that moved us 10% forward but added overhead for any new project which set us back a week or more.