Simple: Toyota would stop being a motor company. It would instead start 10 new motor companies, and a parts manufacturing supplier system for those motor compan

Simple: Toyota would stop being a motor company. It would instead start 10 new motor companies, and a parts manufacturing supplier system for those motor companies, and keep controlling interest in those new companies. More deeply, I don't understand how it's analogous. Why are companies prohibited from selling more than 300K cars? Is it because of too-high pollution (CO2 emissions, tire micro particles, etc.)? Is it because of a mass desire to switch to public transit systems? To stop having so many traffic deaths? If so, then the laws will likely result in a ban on the total number of new cars, or at least higher import fees and higher tax rate. And these all shift the economics of what Toyota would produce. As an unlikely case, if the laws were passed due to a mass movement against displays of wealth, such that private car ownership is frowned upon and luxury cars frequently get vandalized, then Toyota isn't going to make many Lexus sales at all.