How would retained French armored cruisers have affected doctrine and the Second World War?
Short answerThey would have been an interesting doctrinal asset and complicated Italian calculations, but probably would not have changed the war's outcome.
NotesThe surviving armored cruisers would have been doctrinally interesting because France could have assigned them to secondary fleet or regional duties. Their guns and continued presence would also have complicated Italian planning in the Mediterranean. Age, machinery, and the changing character of naval war would still have limited their usefulness. Their survival probably would not have substantially changed the outcome of the Second World War.