How Aegis drives warship superstructure convergence

If every NATO navy adopted Aegis as standard equipment, how would it affect ship design, and which nation would build the largest and most heavily armed surface combatant?

Aegis would encourage similar superstructure shapes across different designs. The discussion does not choose a nation for the largest or most heavily armed ship.

A shared Aegis fit would push different navies toward similar superstructures. The discussion credits Aegis with defining much of the visible shape of ships built around it. The resemblance is compared jokingly to the way unrelated animals converge on a crab-like form. The question of which NATO nation would build the largest or most heavily armed ship is left unanswered.