What would extra Renown-class battlecruisers have changed?
Short answerA five-ship force would make fast capital ships a dependable operational capability and reduce the disruption caused by refits.
NotesThe answer uses a hypothetical five-ship battlecruiser force to show how numbers protect availability. With only three ships, a major refit removes a third of the force; with five, the reduction is less damaging and a pair can remain available. A larger class also makes lengthy upgrades easier to schedule without surrendering the capability altogether. The example turns an alternate-history question into a practical lesson in fleet readiness.