The last update I saw was nearly 4 years ago, and it seems like there are no good answers:
If you look at https://jira.atlassian.com/browse/BCLOUD-12762 one commenter wrote "The amount of work of migrating to Jenkins and Pipeline is about the same. If I am going to invest the effort, I would just rather invest the effort into something with allot more community support and is less likely to be EOLed by Atlassian."
I have to say, Jenkins is looking mighty fine.
Has this situation gotten any better?