Dad bought a new car every two years as we have a 1951 Pontiac, 1953 Pontiac, 1955 Buick, 1957 Chevy, and a 1959 Chevy. Dad was a "GM Man".
As more and more cars were sold in the early 1950s, just simply owning a car was no longer a sign of high social status. Everybody had a car! So advertisements tried to create market niches for various vehicles, and sold the postwar car as a symbol of whatever variant of the American dream took your fancy. John Keats declared, in 1957, that "Detroit believes, and operates on the theory that Americans don't buy automobiles, but instead buy dreams of sex, speed, power, and wealth." Cars got bigger, more powerful and grew fins!