Other means of launching would be massive infrastructure projects, have huge power requirements, or simply might not be practical with current technology (as wi

Other means of launching would be massive infrastructure projects, have huge power requirements, or simply might not be practical with current technology (as with a space elevator). I would guess that the most practical would be some sort of EM launch system + rocket/ramjet, if you could figure out how to transition from the first part to the second, but who knows.