I heard a theory recently that felt right to me: that Elon Musk's Boring Company isn't actually meant to produce usable mass transit. Instead, it's designed to outbid other public-transit proposals and then intentionally fail, so that trust in public transit proposals will be eroded and people will continue to buy and drive cars.
@noelle Nah, instead it isn't actually meant to produce usable mass transit because this is tunnel digging practice for Mars.
The design of the mass transit system itself is a combo of trying out things that would make more sense on a lightly populated Mars, Musk wanting to sell more Teslas (for consumers to use in the tunnels in the original design and as a giant advertisement more recently), and whatever Musk had running through his head when the city demanded a proposal.