[gspetr]

$20/kg is a wild claim.

A typical American semi-truck (18-wheeler) can carry between 40,000 and 45,000 pounds (20 to 22.5 tons) can travel only 160k miles (2/3 distance to the Moon) on a budget of $400k (i.e. $20/kg).

Do you expect us to believe that rocket transportation would be in the ballpark of truck prices in the near future?

[somenameforme]

No I don't. The entire nature of revolutionary change is that it's something that seems unimaginable, at best a fantasy, from a distance. 5 years ago you certainly wouldn't have believed that chatbots would be writing meaningfully complex programs from plain language instructions, and posing a viable threat to various forms of cognitive employment, yet here we are. Even now that we're in that era I think many haven't entirely come to terms with what this means.

With rockets, the fundamental viability is there through full reuse, airplane style. The majority of the cost of a repeatedly reusable vessel ends up being fuel, which is around a million bucks for Starship. Add another million for refurbishing, amortizing costs, and so on and you get a baseline launch cost of around $2 million. With a payload of 100 tons, you're at $20/kg.

The major difficulty is creating a system that's fully reusable, and that's exactly what's being done with Starship. I don't know if they'll succeed to the point of $20/kg, but it's a viable possibility. And if they do succeed then everything is going to get very weird, because the economics of transport become absurd, to say nothing of the entire frontier of space suddenly becoming 100% accessible at a reasonable cost for development.