We’re about one step away in battery tech (which Tesla leads on, among other things (efficiency, integration, etc) from a mid range electric car be upfront cost equivalent with an mid range gas car. Once that’s there, plus charging infrastructure (which is rapidly coming up) the other benefits (maintenance, torque, quiet, fuel costs, etc) will be front and center for every car buyer making the choice between the two technologies.
I don’t think it’s too optimistic. VW with the ID.3 seems like they’re the only ones who will be able to match the scale and qualities of product to the Model 3/Y in the near term.
We’ll see though. It’s interesting in any case.