It has become unaccountable - even our CAA can't get a timely answer from the EASA 'author'.
Classic example was the 'differences' grid between a Dauphin N3, N3+ and EC155B1.
If a pilot is rated on a late generation N3 and the EC155B1 then they have covered any differences with operating the N3+ (AP).........but the grid says you must have a 'differences' course as it does not account for the pilot having flown both types. Then you have to find someone who can give you such a course........world has gone crazy.