A destroyer programme can begin with enthusiasm for cheap ships that can be bought in quantity. Once those ships prove useful, a larger version promises more of the same capabilities. Extra size then becomes attractive because it permits additional weapons or tasks. Destroyer leaders grew within this pattern of expanding requirements and strategic demands.
Chapter · 0:40-1:12
Why successful destroyers invite larger designs
Larger destroyers emerge when navies try to extend the capabilities of an affordable, successful design.