Because that's what happened last time: https://www.nytimes.com/2014/02/02/automobiles/carmakers-to-share-repair-data.html https://www.nytimes.com/2014/02/02/au

Because that's what happened last time: https://www.nytimes.com/2014/02/02/automobiles/carmakers-to-share-repair-data.html https://www.nytimes.com/2014/02/02/automobiles/carmakers-to-... Massachusetts passed a law, and car manufacturers voluntarily made it a national standard a year later. They aren't going to build different cars for one state, and they aren't going to stop selling cars in one state.