I disagree with your take. It says people will either take semi private jets or pay for more room on jumbo jets before they spend money going faster. It's posited that the private jet people derive greater convenience than they would get from going suborbital.
The thing with rockets and jets and the like is that they aren't going to rapidly improve, they are fundamentally limited by chemistry and simple hydrocarbons are incredibly energy dense.
The thing with rockets and jets and the like is that they aren't going to rapidly improve, they are fundamentally limited by chemistry and simple hydrocarbons are incredibly energy dense.