Hybrid. It is a word that used to be almost synonymous with the Toyota Prius, and because of that, car enthusiasts treated hybrids like pariahs. When the first-generation Prius debuted in the United States about 25 years ago, it changed the world. It was one of the first mass-produced hybrid cars ever made, boasting an EPA-estimated 41 mpg combined rating and setting the benchmark for the eco-conscious car buyer.