I think you are mistaken, even if implementation will vary you can have the same behavior (However I won't ever try in production because jsonb base FK is a pre

I think you are mistaken, even if implementation will vary you can have the same behavior (However I won't ever try in production because jsonb base FK is a pretty scary concept IMHO) However on a solution I've implemented on PostgreSQL I expand jsonb as regular field in a view and made that view editable via trigger. This way users can update jsonb_field without being aware of because they edit it through a view as if they are normal fields.