Key difference being that massive bodies always attract one another. Two protons try their damnedest to push away from each other. An electron and a proton, sur

Key difference being that massive bodies always attract one another. Two protons try their damnedest to push away from each other. An electron and a proton, sure, look a bit like two gravitationally attracting objects. But a soup of charged particles looks a hell of a lot different than a soup of massive particles.