THAT is what I said. I mean really, how many people are going to utilize it when neither end is a highly populated workplace? Now, if one of the ends was LA or San Francisco or even the Bart station in Walnut Creek which can get you to San Francisco it would be something.
Not possible due to NIMBY people.
It would be a good project for The Boring Company.
But Elon Musk isn't paying attention to tunnels right now.