We're pleased to announce that the new rich text editor will be available in the upcoming release of JIRA Server 7.2.
We are still working on providing a great, modern text editor for JIRA Cloud with a consistent user interface across all of Atlassian Cloud, including Confluence Cloud, Bitbucket Cloud, and HipChat. We will continue to provide updates on this issue when we are farther along on bringing the new text editor to JIRA Cloud.
If you're a JIRA Cloud user looking for an alternative in the meantime, consider checking out the Simple Edit (WYSIWYG) add-on in the Atlassian Marketplace
Please don't hesitate to contact me if you have any questions or feedback.
Product Manager, JIRA Platform