When it comes to performance, both ICE and E cars are way above "good enough" though (e.g. the difference between a horse and ca 1920's car is much bigger than the difference between any modern ICE and E car). Fastest way to move the needle is to make E cars cheaper to buy and own than an ICE car I'd guess (now I actually wonder how expensive a Ford Model T vs a horse was, both to buy and in maintenance).