TBC has somehow captured the imagination of a lot of people
Yeah, but the problem is now it's turned out to be complete garbage people are going to be like "Hur hur we told you public transit SUCKS! Just build moar roads DUH!". And that is going to stick in a lot of people's minds.
I guess what I'm saying is, of course the first commercial project isn't going to be spectacular
Underground mass transit technology is over 150 years old. If your first commercial project is worse than something from the late 1800's then that's not a visionary move to push technology forward, it's an arrogant move that is holding progress on actual solutions back.
It's the same with hyperloop, in the same time that Musk has been going on about how easy it is China has covered their entire country in high speed rail. Musk's clearly unrealistic pet projects are holding public transit back by distracting from the solutions we have right now.