As much as I’ve come to loathe Neil deGrasse Tyson, he made the point that if Pluto was in the same orbit as the Earth’s, it would sublimate away from solar radiation.
Chemical composition: Pluto probably consists of a mixture of 70 percent rock and 30 percent water ice. Internal structure: The dwarf planet probably has a rocky core surrounded by a mantle of water ice, with more exotic ices such as methane, carbon monoxide and nitrogen ice coating the surface.Nov 14, 2017
As normal, Tyson is wrong. The rocky core would remain intact and quite happily circle the sun.
Why, because it’s kind of a gigantic loosely-packed icy dirt clod?