We are migrating from CQ 5.6.1 to AEM 6.4. As a part of making sure we do not have any broken functionality in AEM 6.4, we would like to check if there are any features which are deprecated and can be fixed using the backward compatibility package.
For doing this, we would like to know how do we go about finding -
1. The features that would work by installing the backward compatibility packages
2. the features that wont work even after installing the backward compatibility package and need custom code changes to handle this situation.
I checked the article - Backward Compatibility in AEM 6.4 , but this talks mainly about the package itself and its need. Nothing about how to find if we need backward compatibility package.
It would be great if any of you can guide on approach to determine on above mentioned points. Your help is greatly appreciated.