GM stopped production of the Pontiac Fiero when only 16,000 were produced. (When the Fiero finally got everything right...)
I had a fiero. Nice zippy little car.
Was a pain to get in and out, but once you had the process down, it wasn’t bad. Once inside it was surprisingly roomy.
GM could not sustain a line of cars that shared so few components with their other vehicles. They could for the higher price of the Corvette but not for the "economically sensible" Fiero.
When GM went back to a small two-seater, they went with the front engine Pontiac Solstice / Saturn Sky which was known within GM for how many parts it shared with Cadillacs, Chevy Cobalt, GMC Envoy, Hummer H3, Pontiac Grand Prix, Corvette, Chevy Malibu, Chevy HHR, GMC Canyon, and Chevy Colorado - engine, transmission, axles, differentials, airbags, steering column, air conditioning, steering wheel, etc. and even then couldn't sustain production for more than 4 years due to declining demand after its second year.