Not really impressive, but interesting. Basically your normal human being can do reasonably well without rare earth and any of the unnecessary garbage ist used for. So, if I have to choose, I take the music group... The only ones that might have a problem are the professional mass murderes and I would consider that to be an advantage for humanity. And, of course, if the Chinese do anything like that, it almost justifies a declaration of war, for the US it would simply be politics as usual, right? So compared to that, I find this a lot more fascinating: https://www.youtube.com/watch?v=aQec39cmA8A
True, but iron filings and chrome flakes will rip and tear that brass alloy to shreds so it is better to keep those contained should they happen to occur.