Comment by modeless

Kessler syndrome is kind of a middlebrow concern people love to bring up because they heard about it one time, but I have yet to see any argument that it is a realistic problem for Starlink based on real calculations. The number of Starlink satellites is large compared to previous constellations, but still tiny compared to space which is of course vast. The low orbits used by Starlink are automatically cleaned up by the atmosphere. And even if there were debris clouds in low orbit it wouldn't lock out space access as it would still be possible to launch into higher orbits. The probability of collision is negligible if you're only passing through.