The military is shifting toward LEO constellations for communications such as SpaceX Starshield. Kessler syndrome isn't a serious concern for those because the orbits decay fairly quickly anyway.
That "quickly" is on the order of years (as opposed to decades, centuries, etc). If the Starlink constellation goes boom, you can't start launching new ones for several years -- and then the build-up would take years, from there.
That "quickly" is on the order of years (as opposed to decades, centuries, etc). If the Starlink constellation goes boom, you can't start launching new ones for several years -- and then the build-up would take years, from there.