And same logic applies to all masses, not only black holes. It’s just nearly impossible to calculate for anything besides a black hole, for a variety of reasons

And same logic applies to all masses, not only black holes. It’s just nearly impossible to calculate for anything besides a black hole, for a variety of reasons. Also, the reference to “known links between the solutions of Yang-Mills theory and those of gravity” (Y-M equations describing charge and EM field) seems to speculatively imply that charge-related information is encoded in the geometry of spacetime, alongside gravitational effects