Volyova did not like planets at the best of times, and gas giants struck her as an unreasonable affront to human scale and frailty. In that respect, they were almost as bad as stars. Alastair Reynolds
Earlier generations of stars in the galaxy could well have had planets. But really, there was only hydrogen and helium to work with, so they'd all be gas giants and not small, rocky planets. Jill Tarter