I've seen some really nice old Airstreams (70s/80s) around but haven't seen any newer ones (90s/2000s). Some have said they aren't the same and the new Thor Airstreams are much cheaper made and are not of the same quality. As long as all those rivets and seams are sealed, not much to go wrong except for the floor.
I don't ever see any old laminated builds at any campgrounds.
On the flip side, I always see a lot of stick and tin old Jaycos at the campgrounds. They are made today even better. Stick and tin construction is pretty basic, the same as many mobile homes with trussed ceiling, walls with studs and crossmembers and real floors. Aluminum siding is pretty much the same with better sealants, but roof coatings are now TPO, EDPM, or a mix of the two opposed to metal roofs back in the day.