The Aeroback Oldsmobile Cutlass and Buick Century, introduced in 1978, were unfortunately not as well received as GM had hoped. In fact, they were so unusual that GM had to stick a 1976 Seville roofline on them in 1980; then they sold like hotcakes.
Poor GM. They see that European cars are selling, so they make their successful Cutlass Supreme more European, which in turn gets shunned by the buying public. Oh well, at least most of those buyers stayed in the fold and bought Cutlass Supreme coupes.
Thanks to chrisgreencar, who shot this survivor and posted it to the Cohort!