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Again, none of this disagrees with what I wrote. You aren’t going to see any breakthroughs soon, either from NASA or SpaceX.
However, I do find this comment a bit strange:
A fundamental design flaw is a fundamental design flaw. You can say that they have since fixed and strengthened the O-ring until the final cancellation of the Space Shuttle program, but that doesn’t change the fact that it poses significant risks to the crew. Just because a poorly designed car hasn’t run into accident, doesn’t mean it’s a safe vehicle. When the accident eventually happens, you’re more likely to be dead than alive.
Furthermore, solid rockets shouldn’t be used for manned space flights, especially for a country as rich as the US. The only reasons to use them is because it’s cheap, and easy to build, and can be stored for years, yes. But there’s a reason the Russians use liquid propellant rockets for their manned space flights. Solid rockets cannot be throttled, and if it explodes, there’s no way to abort the crew safely.
I mean ... you're disagreeing with what you wrote so I don't know what to tell you.
To begrudgingly defend SpaceX here, if Starship actually works as advertised it actually is a game changer. Their intended launch cadence makes things like Skyhooks a realistic consideration which in turn would make Sci-Fi levels of interplanetary activity possible. Even the semi-reusable Falcon 9 has made a big difference in the launch market, for better or worse, Starlink and the other satellite constellations would not have been anywhere near the realm of profitability without it.
For the Shuttle yeah but Orion has launch abort capability. I agree they shouldn't be used on principle but SLS is a jobs program that happens to build rockets, not the other way around.