I wouldn’t say that this is the whole story but it probably is part of it:
The largest destroyer ever built for the US Navy cut an imposing figure as it drifted down the Kennebec River in Maine and toward the open ocean on Monday.
The USS Zumwalt, a 610-foot, 15,000-ton behemoth, will undergo sea trials before joining the US fleet some time next year.
Its pricetag of $4.4 billion (£2.9 billion) is almost as astounding as its bulk, but Navy Captain James Kirk, the ship’s skipper, said he was “fired up” for the Zumwalt to finally set off for the Atlantic Ocean.
Back when, the UK politicians weren’t all that keen on paying the price for more battleships. Do we really need them?
So the Navy went off and bought things that were pretty much battleships but called them cruisers. And then the politicians, a decade or more later, started to ask, well, do we actually need cruisers? Do we have to pay for them in this modern world? So the Navy went off and bought things that were pretty much battleships but called them destroyers.
Not entirely and absolutely true but sorta.
And of course the final end result of this will be corvettes, sometime in the 2200s, carrying a full air arm.