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Maybe a better analogy is nitromethane. If you put it in your honda civic, you will blow up your engine. You put it in a top-fuel dragster which cranks out thousands of hp and needs an engine rebuild after each race.

Better, but with EFI I bet you could get it working with what otherwise looks like an extremely lean tune

Depending on who you ask, RP-1 costs between 20 and 80 times what diesel goes for. Others have tortured this analogy enough, but you certainly don't want to fuel your non-rocket startup with funding that costs far too much, which is conceptually adjacent to the point of the original article.

This is ignoring the whole tanker full of liquid oxygen part of the equation.

I mean you can plumb that into your diesel truck if you really wanted to. Ever see a RAM Fifteenhunnerd run in vacuum?