That is a good point Mike, the new 'wide-bodies' make a big difference. Also, I'd never thought about all the extra sq/ft it takes to cool/heat those big 5'ers like someone mentioned above. I remember when my Father and I drove back to Ohio in '99 to pick up this Airstream from a dealer about 20 miles from the factory. We went in a HUGH 5th wheel that was considerably less then the $48k he paid for the Excella. It was big! Big and cheesy! We didn't get the impression that in 10-20 years that there would be anything left of it, more so, anything left of value to sell. Maybe that is the wrong way to look at TT, but we got over $12k for our '67 24' TradeWind. Try that with any other glue-n-screw box from the same year! It is not going to happen! There are so many points of quality, it is tough to list. From the skin, to the ribs, frame, heated fresh/grey/black tanks, Corian countertops, Moen faucets, Maytag range/oven, Dometic A/C-Frig, Fantastic Fans, solid Oak cabinets/trim, and the suspension! I can't, off the top of my head remember who makes the suspension, but it is outstanding! It is a rubber/torsional tube with shock absorbers. So much better then leaf-spring crap on everything else. And it lasts! And helps to let the coach (Airstream speak) last too. I can't tell you how many Forest Service roads the '99 and '67 have been down over the years, and NOTHING came apart. If you have a flat with a twin or triple axle unit, just take it off and let the hub dangle until you get the tire fixed.
I think the whole Airstream thing is akin to the Cummins thing that we all share. There is a common bond among owners. They know they have the best of breed so to speak. Yeah, there are some issues here and there, but overall, the mystic (sp?), resale value, pride of ownership, and durability outweigh other factors.