Why do auto makers like Toyota, Nissan, Volkswagen, Honda, Ford name their cars something like Camry, Versa, Passat, Accord, Fusion; while luxury auto makers like Lexus, Infiniti, Audi, Acura, BMW only name their cars using a series of letters and numbers like RX, G35, A4, MDX, 328i?
Why are many luxury car makers (e.g. Mercedes-Benz, Audi, and Jaguar) halting production of cars with manual transmissions? Couldn't having such cars still be an option?