"At this moment, practically all American cars look alike. Lest this be taken as a national affront, let us hasten to add that practically all English, French, Italian, Belgian and German cars also look alike. A few cars are made in Spain, Austria, and Japan and they, likewise, are built upon lines closely following the automobile styles of the other countries.
In other words, with a few notable exceptions, motor car bodies throughout the world have become standardized. ..."
- "When Will Motor Car Styles Change? Speculations on the Probable Reasons for the Present Monotony of Automobile Body Lines" Vanity Fair magazine April, 1922.
(That said, there are some pretty spiffy cars shown in the linked article.)