1. Those designs may have just been ahead of their time, and now that retro-future is back in fashion, I could see those swept designs being wildly popular. I would love to own a vehicle that looks like a 1940's-1950's view of the future.
2. I am glad that people like Matthew Bird exist in the world.
This is just wishful thinking, but electric cars might be the way forward in making that happen. Customizable top shell, standardized bottom skate. Design and order your own.
Lots of older-gen designs would not be certifyably street legal if released today.
edit: upon googling the subject, apparently some companies are already working on it. I'm not surprised.
https://i.imgur.com/5sc1Baz.jpg
Also, those don't hit the 1940's-50's future chic look. They are solidly a 1990's product. They're like the Chumbawumba (sp?) of cars.