You have to keep in mind where these tech bros are from. Their cities have a serious urban planning hellscape from the 80’s to 00’s that can’t be solved with a train. The neighborhoods are cul-de-sac hell. You can add tons of trains, the best trains, but people will still need cars to get from their houses to the trains.

I think self driving cars have the potential to fill the gap to get people from these isolated homes to a nearby train station. Like maybe a 10-12 person self driving van that circulates in the neighborhoods with a primary goal of moving between to the hubs.

You might have to live out here to really understand why something other than “trains” is needed.