Feel free to use EOL policy and release notes for answer for your question.
You can see 7.4 and 7.5. has the similar EOL.
Don't forget about migration hub before upgrade to 7.x release from 6.x release and upgrade notes.
For example, I am trying to use the latest version for my instance, like 7.6.1.
Hope it helps.
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
We're bringing product updates and pro tips on teamwork to ten cities around the world.Save your spot