What is a large displacement aircraft carrier used for?

Of course, it's useful. An aircraft carrier with a small displacement cannot deploy any equipment related to combat effectiveness and has almost no combat effectiveness. It makes sense for the United States to build a 100,000-ton aircraft carrier. Without this displacement, they would not be able to carry as many aircraft, weapons, and on-board fuel, and they would not be able to design such a large deck. for normal operations of carrier-based aircraft taking off and landing at the same time and with a normal rotation. Compared with the United States' 100,000-ton nuclear-powered aircraft carrier, the combat effectiveness of the 60,000-ton conventionally powered aircraft carrier is not half worse, but one less.