Definition of luxury is a combination of nice interior, brand prestige, and driving performance(FWD not welcome).im just saying that the definition of luxury is not that difficult to understand.
This is why VW was so eager to buy Bentley. VW Phaeton failed with a nice interior and good performance, because VW wasn't a luxury brand. At the same time, Phaeton's brother ContinentialGT and Sedan are flying out of dealerships. Why? Because of brand.