Long range land based assets.
It is not the last war but carriers did not fare well against land based assets. Air defense and damage control had better be a heck of a lot better than in the past. Even armored flight decks were no match for well placed iron bombs or torpedoes. Offensive weapons have come a long way since then.
I hope carriers are a lot more defensible than I think they are against an enemy resolved to take one out.
The defense is better than most think, though we need to keep up the R&D to maintain and improve as Chinese Carrier Busters get better.
The Strategic Triad worked and I think we need multiple modes to defend our interests. Long Rang Strike Aircraft, Drones, Carriers - all are critical.
Unfortunately, we also need to have a “triad” against the or political anti American Dims, as well. They will cut Strategic assets at the drop of a hat. Harder to kill a multi-year developed Carrier.
Important to remember the US has built 78 large aircraft carriers, of which only seven were sunk in battle, all in WWII and none of those built after 1941 -- the Essex & later classes.
US carriers are very robust, which does not mean "unsinkable", but does mean they can defend themselves against many potential threats.
More important, they always travel with carrier battle groups tailored to specific missions including submarines, anti-missile destroyers and whatever else might be needed.
The issues then include: is our intelligence accurate enough and our technology advanced enough to match-up our capabilities with expected threats?
Answer: so far, obviously yes.
In the future? Well, that depends on who is in charge of our national defense, doesn't it?