Foxtrot Alpha has an interesting article on the possibility of the US Navy going away from an "all nuclear super carrier" force. That is building a mix of Ford/Nimitz class vessels and smaller Queen Elizabeth-ish class ships.
It's an interesting idea, as the US Navy doesn't have anything between the Nimitz and the Wasp/America class. And there could be many situations where one needs a flattop but doesn't quite need the full "Alpha Strike" or multi-mission capability of a Nimitz. Especially with the increase of precision weapons in the last few decades.
And having more flattops would increase flexibility. Especially given that a given number will be in dock for maintenance.