The role of large cruisers in a super-battleship fleet

What is the point of a 35,000- to 39,000-ton large cruiser?

In a fleet of 70,000- to 80,000-ton battleships, it may be the economical size for heavy cruiser roles.

Warship categories are relative to the fleet around them. In a world of much larger capital ships, a 35,000- to 39,000-ton cruiser may occupy the cost-effective middle tier for heavy cruiser missions rather than competing directly with the battle line. Whether the type appears still depends on the operational work the navy needs it to perform.