The 2027, Polestar 6, fastback coupe, 2+2, by Max Missoni and Thomas Ingenlath , will have ' no rear window at all.'
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That should take care of any complaints about rear outwards vision made of fastbacks!
Everything about this car's shape ( all Polestars ) is dictated by aerodynamics and technology according to Missoni.
https://www.caranddriver.com/polestar/polestar-6