I think the two most important things are to offer them in more popular segments and to increase the range to over 100 miles. At 100 miles it's a true EV because that would push the fleet average to over 90% electric vs about 75% now (I get 55%). EVs and EREVs should be marketed as premium vehicles not as economy or green cars, they should be positioned as better than turbos and V8s because they are. EVs and EREVs don't have transmissions and that's a huge advantage because you don't have any gear hunting or jerking. They accelerate faster than equivalent ICE cars and they are quiet. Regen braking increases the controlability of the car, I've noticed this not only while going down mountain roads but also on icy roads. I think we are still a long way from having an affordable BEV that has 300 miles of winter range, until that's possible EREVs are a practical solution. However I think the best way to sell them is not to make them cheaper but to make them worth the higher price.