Company history
The Ducato has been in production since 1981 and has been repeatedly redesigned, most recently into a distinct generation that shares technology across the range. Its importance is not status but scale: a very large proportion of European semi-integrated and integrated motorhomes sit on this chassis.
The practical consequence for an owner is parts and service. A workshop can source a Ducato component in most countries on the continent without special ordering, which is not true of narrower platforms.
It is also rebadged and sold under other names, so a coach may carry a manufacturer's badge while being fundamentally a Ducato. That matters for service, and it sometimes matters for resale.