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Building large payload cheap dependable rockets capable of reaching orbit with high probability is hard.

Even leaving aside the extremes of industrial espionage or "there's only so much you can learn from SpaceX TV", you can be sure that there are absolutely huge swathes of aerospace engineering education and commercially that are using a lot of SpaceX's work as a Cliff Notes of sorts to help improve their own odds.

> And yes, my pun which you didn't get just says: Building rockets isn't hard.

No I get it except it's a ridiculous take. Building rockets is objectively hard.

> In Germany alone there are 3 rocket companies + 1 space vehicle based on governmental programs.

Literally none of them have reached orbit.

its not that they did not get your pun, its that they think building rockets is hard, and i tend to agree