24: Shag Carpeting
The 1970s were a time of fun and free-wheeling, which made the van an appealing option. Drivers could live in their vans and go from concert to concert. Likewise, the interior of the van was one of the most important parts to customize. Shag carpeting was an expensive upgrade that many put in the interiors of their vans.
While comfortable at first, shag carpeting can be a pain to keep clean when it ages. As time went on, the van became less of a cultural phenomenon, becoming replaced by other forms of transportation such as the pickup. Nevertheless, there was a time when shag carpeting was one of the most expensive upgrades that drivers could get.