I believe that bulkheads can be either structural on non-structural in a yacht design. Not being a NA, I'm not qualified to evaluate any specific design, but it seems that if a floating bulkhead is only there as a "room divider" there is no problem. If it is supposed to add stiffness to the hull, well, that's a different matter entirely. And to anchor
chain plates to a bulkhead that is not bonded into the hull quite securely seems folly to me. I know that our shroud
chainplates are indeed bolted to partial bulkheads, and that they are massive and heavily tabbed into hull and deck
There have been reports here on CF of late model boats with floating bulkheads having them come adrift in heavy going, ostensibly from severe flexing of the hull allowing them to escape their grooves. Don't know how reliable these reports are, but that would seem to be a overwhelming condemnation of the construction method.