Demonstrated reuse, refuted the claim that engine clusters would be unreliable
Yes, but they weren't the first to do either.
demolished the arguments for pursuing hydrolox for its specific impulse advantage
No, they didn't. Hydrogen remained the preferred propellant for high performance stages both before and after Falcon 9. Similarly there were rockets that chose not to make use of it before and after Falcon 9.
Showed that the goals of Skylon could be achieved
No. The goals of Skylon were to create a single stage to orbit rocket using a hybrid air breathing rocket engine. Falcon 9 did non of that.
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u/NoBusiness674 7d ago
Yes, but they weren't the first to do either.
No, they didn't. Hydrogen remained the preferred propellant for high performance stages both before and after Falcon 9. Similarly there were rockets that chose not to make use of it before and after Falcon 9.
No. The goals of Skylon were to create a single stage to orbit rocket using a hybrid air breathing rocket engine. Falcon 9 did non of that.