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A a rule of thumb then CCC follows the MM versions when it is features that involves database changes such as using new metadata. You can go to CCC5.7 Release notes to see all release notes for CCC.
Breaking Changes: Going from 5.6 to CCC +5.7
Photoshop/Illustrator
From 5.7 going forward, when users are not already editing Photoshop or Illustrator documents and insert an asset image, a new document will be created and the asset will be inserted into the document.
Breaking Changes: Going from 2.1 to CCC +5.5
Below you can learn in more detail about the changes from version 2.1 to version +5.5 and the value these changes bring the users.
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