The diminishing returns of a 100,000-ton battleship

Were 65,000- to 70,000-ton designs close to the practical limit for battleships?

No; 100,000 tons was possible, but a navy would have to justify three enormous ships over four somewhat smaller ones.

The answer thinks designers could have reached approximately 100,000 tons, so the historical maximum studies were not a hard technical boundary. The decisive issue would be whether three such ships delivered more useful capability than four 75,000-ton ships. The answer shifts attention from what engineers can build to how a navy distributes risk and combat power across hulls.