I found it hard to have a single page with all links to all major Atlassian products release notes.
So here it is… a simple page to refer to all major Atlassian products release notes.
What are Release Notes ?
Release notes are documents that are distributed with software products, sometimes when the product is still in the development or test state (e.g., a beta release). For products that have already been in use by clients, the release note is delivered to the customer when an update is released.
A release note is usually a terse summary of recent changes, enhancements and bug fixes in a particular software release. It is not a substitute for user guides. Release notes are frequently written in the present tense and provide information that is clear, correct, and complete.
https://confluence.atlassian.com/jiracore/jira-core-release-notes-781386726.html
https://confluence.atlassian.com/jirasoftware/jira-software-release-notes-776821069.html
https://confluence.atlassian.com/servicedesk/jira-service-desk-release-notes-780083086.html
https://confluence.atlassian.com/doc/confluence-release-notes-327.html
https://confluence.atlassian.com/bitbucketserver/bitbucket-server-release-notes-872139866.html
https://confluence.atlassian.com/bamboo/bamboo-releases-671089224.html