answer:I don’t see that happening for at least a decade, and probably closer to two. There is still considerable mystery and stigma attached to electric vehicles (EVs), and a ton of misconceptions about them that will take at least that long to overcome. For instance, people think that EVs are slow and weak when the truth is that they can easily hold speeds well above legal (fast enough for any street car) while accelerating twice as quickly as exotic sports cars. Dispelling those notions won’t happen overnight. Once EVs overcome that social reluctance, they will still have to wait for them to be a little cheaper. While it’s true that EVs have far lower “cost of ownership”, they make up for their low maintenance costs by having a pretty hefty up-front cost. At the moment, there is still a price premium for EVs that is not totally offset by credits. That may change when technology advances a bit more to make the batteries cheaper; those tend to be the single most expensive component of an EV. Realistically, I see that happening a little sooner than the social acceptance of battery-powered “toy” cars… barring some patent-trolling of the type that removed Nickel-metal hydride batteries from cars. (Fuck you, Chevron!) After we get comfortable with EVs and they drop in price to where they can compete in purchase price, then we will see the percentage of EVs on the road rise. I think that they will likely lose that exempt status no sooner than the time where they outnumber motorcycles, and probably a bit more; maybe when 10% of the US motor fleet is electric. I’d guess 2030, give or take 5 years.