Indeed - I hadn't noticed the publication date before encountering the remark about Pioneer's Jovian encounter still being in the future! High time for an update; although many of the additional moons may not be of direct interest to settlers ("By most counts, Jupiter has between 80 and 95 moons, but neither number captures the complexity of the Jovian system of moons, rings and asteroids." - https://science.nasa.gov/jupiter/moons/) but the much richer picture of the larger moons and the surprising radiation environment should either grant the Jovians their empire, or sadly banish them too.