Why Trafalgar to Dreadnought forms a useful century

Could the Trafalgar-to-Dreadnought story be continued from Dreadnought to the present?

Yes, but it is clearer as two arcs: Dreadnought to Vanguard, then Vanguard to the modern Queen Elizabeth class.

The years from 1805 to 1905 form a neat century with a clear technological narrative from Trafalgar's sailing battle fleet to Dreadnought. Extending the same treatment to the present would compress too many distinct changes into one story. Dreadnought to Vanguard forms one later arc, and Vanguard to the Queen Elizabeth-class carriers forms another. The answer turns chronology into a way of organizing technological and institutional change rather than a list of ships.