"In a 1982 congressional hearing, legislators asked [US Admiral Hyman Rickover] how long American carriers would survive in an actual war."
his response? “Forty-eight hours”.
https://warisboring.com/the-u-s-navy-s-big-mistake-building-...
https://warisboring.com/the-u-s-navy-s-big-mistake-building-...
A modern war with another major nation likely won't last months or years like traditional wars. There's too much destructive firepower available to major nations for that to be realistic.
It's more likely that it will be destructive, brutal, and very swift.
Not to mention Rickover said that nearly 40 years ago - our modern carrier groups have a lot more firepower and technology at their disposal - including new generation stealthy ships.