(It needs to be added that during eras when car styles were either rapidly evolving or pushing off in odd directions -- from 1934 to 1962 or thereabouts in the USA -- stylists did have to pay attention to the degree to which drastically new themes would be acceptable to potential buyers.)
I photographed the images below from a fascinating (to me) photomural at a Seattle drugstore. The setting is Seattle's main downtown intersection at the time (corner of 4th Avenue and Pike Street with Westlake Avenue branching off). I like the scene for its large variety of cars and because it was photographed at a time where various brands could be identified. That is, I find it difficult to identify brands in 1920s or earlier street scenes because the cars seem too similar: I'm basically a post-1930 car guy.
The mural caption states that it was taken in 1942, and it probably was. But it might as well have been the summer of 1941 for several reasons. The summer of 1942 was after the USA entered World War 2 in December of 1941. By that time, car production had been curtailed and gasoline rationing was in place in Seattle by June of 1942, so traffic would be expected to be comparatively light, not so busy as the photo shows. I see no military personnel, and some might have been evident were it 1942. About half the license plates are 1941 plates (the dark ones) and half are 1942s which is a wash -- about the same would have been seen either summer. Finally, I don't notice any 1942 model cars; the newest are '41 models.
That said, let's take a look.