Dreadnought was a transition rather than an isolated miracle. Her all-big-gun armament and turret mechanisms gathered developments that other powers could in principle have assembled, while her wing turrets retained earlier compromises. Britain brought those available technologies together first, much as it had done with HMS Warrior. The ability to range, direct, and use that firepower effectively still had to mature because a weapon's value depended on the whole system that controlled it.
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Dreadnought showed that guns needed control as well as range
HMS Dreadnought combined existing technologies into a new type of battleship, but it also exposed the next problem: harnessing big-gun fire with adequate control.