The voyager probes were built in an incredible hurry to take advantage of a once-in-a-few hundred years optimal gravitational boosting path. Something launched

The voyager probes were built in an incredible hurry to take advantage of a once-in-a-few hundred years optimal gravitational boosting path. Something launched later would never have been able to keep up, plus the antenna would be so, so much worse. The ground reptilian networks have effective antenna lengrhs of miles.