While it was always difficult to picture a Cadillac driver in an electric car, GM made it impossible with the ELR. Powered by a similar drivetrain as the original Chevrolet Volt, this pricey plug-in hybrid coupe puzzled reviewers and consumers alike. In one of the best contemporary burns, a Consumer Reports staffer labeled it “a $75,000 Chevy Cruze.” At its peak (2014), ELR sold just 1,310 units, or about 100 a month. Biggest question: Why would anyone ever choose this car over a Tesla Model S at the same price? Answer: No one ever did.