SASLess
Should the Navy looked for a cheaper alternative than what they did with the Zumwalt....say more conventional ships that cost far less than the Three Billion US Dollars as do the Zumwalts, but equipped with Rockets and Missles rather than the sophisticated gun system?
Compared to, for example, Harpoon the range of this gun and the guidability of LRLAP are quite favourable. Had the rounds ended up costing tuppence-ha'penny, it'd be terrific. But it's not surprising that they're expensive; they're essentially a gun launched cruise missile with the added complexity of having to make it all survive being fired from a 155mm barrel = pricey components.
Perhaps it's just fundamentally cheaper to have a small jet engine and a tank of fuel, no 100s of G firing shock, and call it a cruise missile. The cost of the electronics in such a thing are pretty small these days.
One justification for continuing - it's easier to carry a lot of shells than a lot of missiles. If they anticipated having to engage a lot of targets, shells-as-good-as-missiles would be a useful trick. Trouble is I can't think where all those targets would be coming from in this day and age. Cowes Week?