i think the virgin hyper loop is a great and nearly perfect idea, but i have just a few small suggestions to make it that much better:

one, cars could be made larger, allowing more people to be in a car, thereby through economies of scale decreasing costs for everyone.

two, each car could have a set schedule for arrival and departure, allowing for incredibly efficient and consistent transportation planning.

three, instead of using mostly untested and expensive experimental technology, we can use the well-proven designs from places like Japan that use maglev and high speed rail trains for passenger transportation regularly

these are just a few small thoughts i had, feel free to come up with your own thoughts in the replies! real excited to see the future progress here :)