I only know one person who has ever found phenylephrine effective. It's definitely not for me, but they've done single-blinded self-studies (with help) to see if it's a placebo effect, and it's pretty clearly not.
DXM is also not a placebo, although it might be specifically for cough.
I don't especially want the FDA to ban them, but requiring separating out the acetaminophen might not be the worst idea.
I'm not much of a physicist, but this rates a 9.5/10 on my personal BS mater. A single citation, two lines of analytical mathematics, a promise to resolve the Hubble tension without actually doing so quantitatively (or indeed, even conceptually), and I'm pretty certain (> 99%) that the no-hair theorem applies specifically to black holes, not other massive objects.
I know a little bit more about orbital mechanics, and I know that the internal structure of a planet matters for the stability of an orbit. While at larger distances the effect becomes small enough to ignore, it never really goes away. Whereas a black hole is indeed thought to behave like a point mass.
Eh, there were plenty of games that were coded for a particular clock speed, and then once the SE came out, had an update that included a software version of a turbo button, let you select which of two speeds to run at. They run FAST on an SE/30 or Mac II and unusably fast on anything newer.
DXM is also not a placebo, although it might be specifically for cough.
I don't especially want the FDA to ban them, but requiring separating out the acetaminophen might not be the worst idea.