Elon Musk retweeted a post from WintonARK, which highlighted that California is the only state prohibiting insurance companies from pricing policies based on actual driving behavior. This has resulted in heavy FSD users in Tesla's largest U.S. market being unable to receive insurance discounts commensurate with their low-risk driving. The tweet argued that the California Department of Insurance (CDI)'s action is tantamount to taxing road users who actively employ "life-saving technology" to subsidize those more likely to cause accidents.