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USA: Slate's New Electric Truck Will Cost Slightly More Than $24,950
(www.caranddriver.com)
This is a most excellent place for technology news and articles.
Squarebacks have a huge void you have to drag along.
That seems likely, yes, but you don't know for sure without CFD or wind tunnel testing. It could be that there's some weird detail with the fastback that somehow manages to make it worse.