Why won't more manufacturers convert their HUD factories to modular?

With the MH industry still in its 4+ years doldrums it makes sense to convert those factories building HUD-coded homes and have them start making modulars. This recent article (read here) on builderonline.com is telling a great story about the problems facing the factory-built housing space. I know for a fact the modular home factories in the west cannot meet their current demand. Clients are waiting more than 6 months for the delivery of their home. With construction time now pushing 9 months, modular is losing its time-saving feature. Fleetwood should seriously consider "flipping" 1-2 west coast plants to modulars. That would sure help the company