I hadn't been aware of the Lagoon bulkhead problem before running across this Utube, but it doesn't surprise me. A condo cat, 30,000 lbs on a 24 foot beam calls for a lot of structure. Cats have a number of inherent problems that get disproportionately greater as they get bigger. Of course the longer the cat the more people want to pile on, and that requires more displacement
which increases the stresses between the hulls, which requires more structure, which adds more weight. It's a negative design spiral that can be broken by going in the opposite direction from what customers want. Several aspects of catamaran
design are like this such as bridge deck
clearance, standing head
room, and windage in smaller cats, often resulting in compromises that result in clumsy motor
sailors that will not sail well to windward, or pounding. You give up one thing to gain another.