Thanks again for voting and commenting on this issue. We are very pleased to announce that we are actively developing the Jira Cloud Migration Assistant, which will enable site administrators to migrate selected Jira Software projects from Jira Server to Jira Cloud.
Note that this ticket has been marked as a duplicate and so we're encouraging you to had over to track progress over on JRACLOUD-31806 so if this feature is of interest, please head over to vote, watch or comment on further updates.
Thanks for everyone’s patience. We look forward to speaking with you as we get closer to delivering this long anticipated feature.
Jason Wong and Chris Clarke
Product Management, Atlassian Cloud Migrations