Where tumblehome hulls might be worthwhile

What is the smallest class of ship likely to benefit from a tumblehome hull?

Probably frigates and larger fast ships; OPVs may be better served by less expensive conventional hulls depending on their mission.

Tumblehome may suit ships intended to move quickly, especially frigates and larger combatants. Offshore patrol vessels can justify simpler, cheaper hulls depending on their role. Other forms, such as X-bows, remain possible, while tanker-derived auxiliaries will follow commercial design economics.