There are many "strange" systems. I'm my experience when a Neutron Star is the main of the system, the starforge starts to get weird. For example i saw a NS with a single ELW orbiting it at 3000Ls. The single planet of the system had almost 300K medium temperature, an atmosphere, liquid water and carbon based life. Such a planet could have formed in another system and then been "captured" by the NS, but how it could stay like that recieving no more energy?