Sure, but what if they're orbiting the center charge at relativistic speeds? Now they also create a magnetic field. My guess is that somehow it ends up being dy

Sure, but what if they're orbiting the center charge at relativistic speeds? Now they also create a magnetic field. My guess is that somehow it ends up being dynamically stable. Also that the strong force holding the nucleus together is actually mostly magnetism. I would also posit that just maybe there is such thing as an electrostatic black hole. When matter is accelerated gravitationally to speed c, you reach an event horizon. Same should happen if the acceleration is due to charges, but will happen at a scale similar to the size of baryons. I'd say there is a lot of room for some theoretical developments in this area.