I paused my software development career to sell cars for a year. I sold cars at two different Honda dealerships, both owned by Fortune 500 companies in, what I believe is, the densest single market for Hondas in the US (Metro DC). There's a couple things missing from the situation as described by the author. First, dealerships don't really make that much of a profit on new car sales. At least not Honda dealers. Used…
This is essentially the case on all volume mainstream manufacturers. Hyundai/Kia, Toyota/Scion, Honda, Nissan, Mazda, Ford, Chevrolet, Dodge/Chrysler all fall in this bucket in the United States. The exception to this being trucks (RAM, GMC and Chevy Silverado, Ford F-Series).
Where money is actually made on sales are in the luxury segment. However, who is really making the good money has become interesting over the years. Lexus, Acura, and Cadillac margins are fine, but the Europeans have better margins still, though there's still a chasm between everyone and the VW Group.
Rolls-Royce aside, BMW only has Mini which has been little more than break-even since its relaunch. Moreover, there are slimmer margins on the 1/2-series since they serve as conquest cars. The same goes for Mercedes-Benz with SMART, and the CLA/GLA being their (very aggressively positioned) conquest vehicles. For mainstream luxury brands, Audi has some of the highest gross margins at 10%. Yet their ultra-luxury brands -- Bentley, Lamborghini, and most importantly Porsche -- is where the real money is made (at least on a per-unit basis). I struggle to think of the last time (since their return to form 10-15 years ago) where Porsche's gross margins were under 20%. Porsche prints money.
Sorry for not taking JLR into account, as they're still restructuring. Infiniti is excluded because Ghosn has nearly killed the brand twice. As for Tesla, I've been saying for years that they were more likely to model themselves more after Porsche than Honda/Toyota, as that's where the real money is for a still growing company. When the Model X pricing was announced, that was all but confirmed.