Theemile wrote:I would almost roll the lifespan into the capability calculation, but your point is so true. Sadly, so many concepts are studied to death (especially in peacetime) that when something is finally agreed on, it is too late to actually do the upgrades on the ships. Or a budget compromise during construction doesn't allow a (known) forward thinking technology or design element to be used later. Take the short hulled Essexes or FFG-7 Frigates as perfect examples. As a result, they had short lifespans when they couldn't adopt to new technologies.
I was thinking of ships like HMS Eagle (R05) which got a not-inexpensive refit in '66 only to be retired early in '72. Even HMS Ark Royal was refit in '69 and headed off to start the retirement process in '78
Though to be fair they basically knew they were stepping away from carrier based air before that - apparently her refit was party for political reasons; to keep dockyard workers employed.
But if the Royal Navy had wanted to keep a carrier presence they'd probably have been better off skipping expensive refits on the WWII design carriers and putting that money towards a couple new slightly larger and more modern designs planned from the keel up to support fast jets.