SpaceX Reveals Next Generation Starlink Satellites

For all the talk about the Kessler Syndrome, I can't find research on chances of cascade based on number of satellites. My understanding is that syndrome only happens once there is lots more debris, there is space for many more satellites. Satellites can maneuver away from potential collisions.

SpaceX is in good spot for not causing orbital pollution. The low altitude means the satellites decay in five years. Decay depends on size which means debris would decay even faster. There is also not much else that low so lower risk of collisions. Most of the debris would go in same orbit instead of hurting other LEO satellites.