Not just killed US air superiority, but potentially made thousands of soviet-era launchers capable of cheap modernization to counter 5th generation stealth craft.

It would make it possible for dozens of non-state actors to recreate the Yugoslav Nighthawk incident.

Yeah, it basically makes the whole technology useless against peer adversaries. It doesn't seem like there's an easy way around this either.

Turning off the signal in an area is also bad because it immediately tells whoever is there that you're obviously planning to fly stealth aircraft there.

yeah, but China can launch their own constellation now that would let them do the same thing. The best part is it doesn't even matter who operates the satellites. As long as you can tack signals from them, you'll be able to see the shadow of the jet passing under.

Thing is, even if they can control musk they can't necessarily control other companies that are trying to compete. There's more than a few sources of radio waves in LEO now, starlink is just the largest for now.

And if there isn't, nothing is stopping any government with the funds from stuffing a bunch of high powered radio transmitters to satellites to blast X or Y region to deter stealth aircraft

I'd bet they already knew this was possible and hoped to exploit it against China for awhile before anyone else figured it out.