Title should be: slowly rotating Kerr black holes are stable. The proof doesn‘t say anything about fast rotating black holes or charged black holes (Kerr-Newma

Title should be: slowly rotating Kerr black holes are stable. The proof doesn‘t say anything about fast rotating black holes or charged black holes (Kerr-Newman metric). And the proof assumes the world is classic. It doesn‘t take quantum effects into account. So it is a mathematical achievment to prove the stability of the Kerr solution of general relativity. It doesn’t tell us anything about real black holes though.