2. Pontiac Trans Am: Removable T-Tops

In the late 1970s, the Pontiac Trans Am introduced dealer-installed removable T-tops, offering an affordable semi-convertible experience. This option allowed drivers to enjoy open-air driving while maintaining the structural integrity of the vehicle. Similar to sunroof options, T-tops provided a balance between the benefits of a convertible and the practicality of a hardtop. The popularity of T-tops was further solidified by their prominent appearance in the 1977 film “Smokey and the Bandit,” where a black and gold Trans Am featured the distinctive roof panels. (hemmings.com)