Making cruiser submarines work demands unusually complicated engineering. The attempt could develop technologies that also improve ordinary submarines. Nations that neither pursue the research nor build comparable fleets could fall further behind, especially Germany and the Soviet Union in this scenario. Those research benefits do not depend on cruiser submarines becoming effective warships. The vessels themselves would have little operational value beyond unusual, specific circumstances in this assessment.
Notable Point · 56:35-57:29
Difficult submarine designs can advance ordinary submarines
Engineering complicated cruiser submarines could create useful technologies even when the completed vessels have little value.