Would purpose-built Courageous-class carriers survive the Washington treaty era?
Short answerThey would likely survive because the alternate timeline produces no Washington treaty, while their success drives continuing experiments with carriers and faster battleships.
NotesAircraft have proved devastating against ships in harbor but not yet against maneuvering battle lines at sea. Navies therefore retain battleships while trying to make them faster and improve carrier strike against moving targets. The American standard-type battle line would look especially slow in this environment.