7.0.0 is addressed for redesign of distributed facilities
Backward compatibility for local buckets was not broken. If you do not use distributed features then upgrade will be transparent for you.
|some API was marked as deprecated, it will be removed in the 2023. Each deprecation note picks to the new API that should be used instead.|
API for distributed facilities was rewritten a lot, especially the builder API. The best migration strategy will be just find documentation for your particular backend there and rewrite the code according instructions.