Montana's wartime role and possible service in Korea and Vietnam

If the Montana class had been built, would it immediately have been relegated to second-line duties?

It could still perform the wartime roles of South Dakota and North Carolina more capably, with later service in Korea and Vietnam also suggested.

The Montana class could perform the wartime duties of the South Dakota and North Carolina classes with greater capability. Its speed would be closer to those ships than to the faster Iowas, while still qualifying it as a fast battleship. The design is treated as a deliberate reduction in speed in exchange for a large increase in fighting power. Later employment in Korea and Vietnam is proposed even if the ships moved into a secondary role.