From an IRC meeting, we decided to get a migration page on the website for every upcoming minor version, and add one for the missing ones after 5.0.

The http://hibernate.org/search/documentation/migrate/ landing page would point to the index.

Older information will not be migrated from the wiki page.

The migration steps on the website will assume migrations between stable (Final) releases, which is different than the model we followed on the wiki which included detailed differences for each tagged release (it did include migrations between alpha and beta versions).