content: For a variety of reasons.    The cost to install infrastructure for a hyperloop between CA and SF is going to be out of this world. Even a train from LA to Vegas is billions of dollars, and because of land issues likely in the tens of billions if not more. Not to mention the environmental hurdles this will face.    With Uber, Lyft and taxi's it is very easy to get to/from airports, the hyperloop will not bring you to your final destination so this really is moot point as you'd need to travel from the hyperloop station the same as an airport.   A train ticket from SD-LA on the Amtrak is 40 bucks. A ticket to SF would be on par with flying or more.    Airlines are profitable because they can carry hundreds of people each trip, I doubt the hyperloop would be able to carry anywhere near as many people.   Finally, the technology hasn't been proven yet, so even considering it as a viable competitor to commercial air travel is pointless as this stage.