Were the R-class battleships already obsolete and useless by the Second World War?
Short answerNo; they remained tough and well armed, but their structure made deep modernization less practical than it was for the Queen Elizabeth class.
NotesThe Revenge-class ships were old and slow, yet they retained real military value. Pre-treaty planning would have retired Royal Sovereign, Revenge, Resolution, and Royal Oak between 1936 and 1938, reflecting an expected service life of roughly twenty years. Treaty limits extended their careers, while their guns and toughness kept them useful. The older Queen Elizabeth class adapted better to major reconstruction, which helps explain its stronger Second World War performance. A deep R-class rebuild was technically possible, but the fleet expected new King George V and Lion-class ships to replace them instead.