With the introduction of the Toyota Crown Royal Saloon in August, 2001, 42V automotive electrical systems made the transition from a technology for the future to present-day production. Nevertheless, there is widespread malaise in the 42V technical community, stemming from a slower than expected introduction to the marketplace. This paper discusses some of the reasons for the slow adoption of this technology, and indicates a possible way forward. This paper looks beyond the initial uses of 42V in limited-volume, high-end cars and light trucks, and discusses the prospects for 42V in mass-market vehicles, given what is presently known about the technology. It is concluded that a case can be made for 42V, even at some increment in cost. The motivation is improved fuel economy. The cost targets necessary for this benefit to be achieved are discussed, and new components being widely discussed as part of future electrical systems are evaluated for mass-market applications. New developments with higher potential are suggested.