1: 2000 Saturn L-Series
The Saturn brand was a unique offering in the automotive industry when it first hit the market. General Motors invested billions of dollars in the development of the brand and the unique cars sold. The Saturn models were unique to this brand and not shared with any other GM models (via Forbes).
By the time the L-Series rolled around, the Saturn models were dated. There were better compact offerings that had come to the market. Everything that made the Saturn brand unique at the start was not there anymore. You could say the L-Series spelled the end for Saturn.