I think it will be a very slow conversion, basically a more drawn-out version of VHS-to-discs (DVD/Blu-Ray/4K), as cars usually last longer than consumer electronics. We are already seeing similarities: a few early adopters pave the way, the market adapts to accommodate them a little but support (charging stations/DVDs) is not the standard and not always available, then as more people slowly try the new tech, the adaptations grow. Once they reach a tipping point, both choices are supported by the market for a while, and you get a higher conversion rate, but a lot of holdouts don't want to invest the money, so you have an inversion, where the old tech is still supported, but the new tech is the standard, and the old tech has support that is harder and harder to find. Eventually companies decide it's not worth their while to support it, and then the true death of the old tech begins.