One advantage of L2 is that it's a point of gravitational metastability when entropy inevitably hits, your satellite will slowly fall away from the point, and e

One advantage of L2 is that it's a point of gravitational metastability when entropy inevitably hits, your satellite will slowly fall away from the point, and either depart for a long, initially slow, fall back to something rocky, or spiral out from the Earth-Moon system into interplanetary space. An L2 swarm isn't bound together by gravity, it actually has to maintain active control to stay there, so it's a "self cleaning" area.