Like what i see in the Roadmap functionality but will soon be on a data-center deployment.
WIll it be included eventually? When?
Does anyone use something else as an alternative?
This question has been posted a lot of times, a little research in the Atlassian Community would have answered your question.
To be short, no it will not be. Officiel answers is at the "Current status" field here:
If you want an alternative try, Atlassian propose Portofolio for Jira
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