> No not totally obsolete, just unable to operate without aircover. <
Right. Battleships were on the way out even in the 1920s. But that sunken battleship had no air cover, and no manned AA guns.
The US Navy didn't address adequate AA protection on ships seriously until after the battle of Midway. The 1.1 inch, 3 inch and .50 cal close in AA of the era was not adequate.
Addition of 20mm, multiple barrel 40mm mounts and particularly the proximity fused 5 inch projectiles were gamechangers. They were not in play until early 1943.
True...but not sure how a hypersonic cruiser with a small suitcase nuke(or a mini MOAB) would do.
OSTFRIESLAND was also anchored, had no AA defenses, and no damage control.
Conceptually the heyday of the armored battleship was over, but as these things go, weapons systems buy a couple more decades after a few upgrades and some mission changes.
What really killed the Battleship was the anti-ship missile which could kill over-the-horizon and be mounted on unarmoured destroyers & light cruisers that were far more economical.
Same goes for carriers. They are obsolete without air cover.