I can’t see any more efficient ways of getting people from place A to B faster. Hypersonic speeds can’t be achieved on the earth’s surface due to its atmosphere. Therefore, I see only two ways to go about it:
Spaceships that exit and reenter earth’s atmosphere.
Hypersonic trains in a vacuum chamber, I.e., a Hyperloop .
I did compare this above. Like… Wouldn’t Hyperloops be safer and a lot more efficient than spaceships? Basically, the trains vs flights debate of the future.