I don't class Porsche, Lamborghini and Bentley with the others given their RADICALLY different target markets to that of Audi, VW, Skoda and Seat. The former are MUCH closer to Bugatti than they are to SEAT.
The technology initially introduced into Porsches and the like eventually trickles down into VW then Skoda/Seat in progressively more affordable (and sometimes reliable) forms.
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