Why tumblehome hulls remain uncommon

Why are tumblehome hulls rare on modern warships despite their stealth benefits?

They can help reduce radar signature, but construction and seakeeping tradeoffs limit where the form is attractive.

Tumblehome can reduce radar cross-section, but the hull form is difficult to build and balance. Its usefulness depends on expected sea states rather than stealth alone. It is easier to accommodate for many Pacific or Mediterranean operations than for routine North or South Atlantic service. The form remains usable in those oceans, though it is less flexible as a default choice. Tumblehome trades signature reduction against construction complexity and seakeeping.