Eh, not for long. LEO everything falls eventually. HEO… that can take a long hot minute.
LEO we’re still talking the better part of a decade, especially the derbies that get kicked to higher altitudes by the collisions. It’s not as permanent as higher up, but it’s still a strategic level capability, not tactical.
The numbers I’ve heard for LEO are like 4-5 years. But that point is whatever.
Kessler’ing the LEO means it’s now harder to retaliate in HEO. It would be an easy win for Russia to knock out Starlink if the US government is actually relying on it in any meaningful capacity.