Excellent points. I want to follow up with some back-of-the-envelope math on this later, if I have time. My intuition was that it takes a whole heck of a lot of

Excellent points. I want to follow up with some back-of-the-envelope math on this later, if I have time. My intuition was that it takes a whole heck of a lot of fuel to get someone to even LEO velocity. Would love to see how that corresponds with air travel.