We'll agree to disagree.
I think vans look great, and one aspect that I completely love is the fact that vans are all about function over form. It is the truest sense of a utility vehicle, and most SUVs, crossovers, and the newest generations of vans share far more lineage with mini vans than utility vans. As much as I personally disdain many of those vehicles, they do fit the bill for most people, so that's the direction the car companies are taking.
Econolines will eventually look old and outdated? Maybe, but given the basic design has been around so long, I'd say 'iconic' is a better descriptor.
As for the ProMaster picture you posted, I immediately thought of this: