I'm under the impression that their costs are cheaper right now because public agencies are eager to see a working test case and so exempted them from environme

I'm under the impression that their costs are cheaper right now because public agencies are eager to see a working test case and so exempted them from environmental clearance. I doubt that will still be the case when the scheme changes from "a single tunnel from Musk's home in Bel-Air to his work in Hawthorne" to "hundreds of stacked tunnels traversing the entire city." But I'm open to corrections.