Naval aircraft carriers are obsolete in modern warfare between highly developed nations. Land based missiles made the aircraft carrier obsolete once missiles launched from land gained the capability to fly a further distance than the carriers planes, which is one reason most countries do not bother with building carriers and the needed support vessels unless they have designs on undeveloped countries as it is simply not worth the cost. Submarines made the need for most surface warfare ships obsolete. But, there is a lot of money to be made and promotions to be had by continuing to build, maintain and man surface warfare ships.