“The worst case in this data set is a shift from 30ms to 80ms.”
Starlink dishes switch satellites every 15 seconds, and latency jumps at every switch. The link also drops 1 to 2 percent of packets that have nothing to do with congestion. CUBIC reads that loss as congestion and backs off, averaging about 45Mbps on a path SpeedTest rates near 250Mbps. The marketing number is real. Your TCP stack just can’t use it.