https://www.researchgate.net/publica..._a_Narrow_Wake
This is an interesting proposal. A light truck for passengers-plus-cargo instead of cargo-plus-passengers. It reminds me of nothing so much as Neil Blanchard's CarBEN but with side doors and rear entry for cargo only. The upright cargo hold follows the Tropfenwagen but with very modern fenders. There are also things I haven't delved into about sight lines and possibly acoustics.
It's seems worth a thread. It's hard to quote illustrations and DuckDuckGo came up dry, so have a look.