If Roma had survived the war, how long might she have lasted before scrapping?
Short answerIf Italy retained and operated her, she might have served long enough to acquire museum value; transfer to another navy would make that outcome much less certain.
NotesRoma's counterfactual fate depends on the postwar settlement. Transfer to the Soviet Union would place the ship on a very different path from retention by Italy. If the Italians kept one modern battleship in service, it might survive long enough to become an established fleet symbol instead of an immediate scrapping candidate. That institutional longevity could make preservation as a museum ship plausible, although the outcome remains a possibility rather than a certainty.