I can’t decide which space company I like most
SpaceX is farthest along, but feels conventional except for One Weird Landing Trick
Blue Origin is what I’d ride if I had $. Most serious about reliability, plus huge windows/best view
Virgin feels like actual future preview 
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Can you elaborate on the tech being the limiting factor for terraforming?
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Need a magnetosphere for serious terraforming. No way to do that now.
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Are there reliable (not from Quora, that is, bless them) numbers on what the carbon footprint of such suborbital flights would be?
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Dunno. Possibly low if upper stages use hydrogen/oxygen engines.
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who's made the suborbital claims besides Elon with the BFR
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Hard to imagine how suborbital flights becomes much of a business. Combination of very expensive and terrifying. Safety journey is decades behind commercial flight
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