I agree mostly, although as a counter-example, about a year ago Nutella released a new "extra cocoa" variant which was much tastier, and a bit less unhealthy (lower sugar content).
It was so good that I refuse to buy regular Nutella anymore, even though the "extra cocoa" edition seems to be no longer sold.
It might differ between countries, but I've found that physics is one of the most valued degrees. It's a demonstration of problem-solving skills that are very desirable for a variety of jobs (e.g. software development).
SpinLaunch's website claims: "To date, we’ve conducted tests over 6x the speed of sound."
However, that doesn't seem possible because the centrifuge is not in a decent vacuum (as Thunderf00t points out in his second video) due to the whooshing sound of the centrifuge 'blade', and the speed can be estimated as just less than the speed of sound. If they have the ability to do hypersonic tests already, why would they not show it in their promotional video?
The fact that they intentionally blurred the data on the screens during the demo is also odd.
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Regarding your final point, it's much easier to pretend to be a genius than to actually be one; Elon Musk is a master at it. Additionally, debating skill is a very misleading measure of intelligence.
He is a scientist with published papers, and he seems to have a decent understanding of physics.
Obviously scientists are not perfect, but you seem to imply that most of his videos are incorrect. I can't see any evidence to support that, but I'm happy to be contradicted.
People aren't offended by the change; they're irritated.
I'm irritated because it was an unnecessary change based on unsound reasoning, made by people who claim to represent a minority while not belonging to the minority or understanding its members.
I'm irritated because I can't give instructions to junior developers as easily: no longer can I rely on all of my instructions working, and documentation now requires clarifications and caveats which used to be unnecessary.
I'm irritated because it appears that GitHub has made it intentionally difficult to change the main branch in the "new repository" page; while it shows an option to change the default branch name, this requires refreshing the page and losing the repository name and description which you've already written.
It was so good that I refuse to buy regular Nutella anymore, even though the "extra cocoa" edition seems to be no longer sold.