The “hyperloop” ignored centuries of lessons from making metro/subway transit lines and is suffering for it.
Single loop, single track operation so you have no tolerance for an individual vehicle having problems or delays. 2-3 passenger vehicles, each with a driver, instead of gaining throughput by putting more passengers per vehicle. To try and make up for the first two, incredibly time sensitive load/unload operations, which mean you have to ‘train’ passengers and load them and their luggage in <30s/person or the entire system suffers. High wear on the vehicles because it’s rubber on ‘rock’ instead of metal on metal.
More operating vehicles, all of which are only constructed to consumer standards, operating in harsher conditions than they were built for, for longer than they were meant to run without maintenance, leads to more breakdowns faster. Any breakdown trashes how the whole system works, because it’s a single track operation.
The Victorians literally built better subways using horses and vacuum systems.