Somewhere I remember hearing that the initial rollout would be between the SF and LA corridor, to see how widely utilized battery swapping would be and to learn more about the customer usage model ... and if used, then other markets would be looked at.
I thought it was Elon, but I could be wrong.
I remember that too. I believe it was at the Germany event (or UK event). Elon Musk responded to a question regarding battery swapping in Germany. And, as Bonnie stated, the reply was there would be an initial rollout in the SF and LA corridor to evaluate the battery swapping application. Based on the tone and language Elon used, it appears Tesla does not plan on implementing battery swapping beyond SF and LA anytime soon.