Did Zumwalt have enough power for a railgun, and why did the US programme struggle?
Short answerIts power supply was considered adequate; the criticism concerns an overly ambitious weapon requirement compared with Japan's smaller, more focused railgun project.
NotesZumwalt's electrical capacity is accepted as sufficient in this exchange. The difficulty is the ambition to produce a railgun that could fulfil many roles at once. Japan's project is compared with an OTO Melara 76 mm gun in scale and purpose, rather than an 8-inch weapon. That comparison describes a more limited development goal, not a claim that the two systems share ammunition. At the time of the stream, Japanese testing was viewed favourably, with widespread installation dependent on successful development.