Single gun mounts trade firepower for easier upkeep

Are dual naval gun mounts inherently better than single mounts?

Dual mounts offer wartime concentration of fire, while modern single mounts are often chosen because they are simpler and cheaper to maintain.

Twin mountings are attractive when maximum wartime firepower is the overriding requirement. Single mounts reduce mechanical complexity and maintenance burden, which can make more sense under tight budgets and routine service conditions. An economic procurement argument should not be mistaken for proof of superior combat capability.