  Recently it has been shown that quantum fields can be regular on the inner,
Cauchy horizon of a rotating BTZ black hole, which appears to indicate a
failure of strong cosmic censorship. We argue that, instead, what these results
imply is that the inner horizon remains non-singular when leading-order
backreaction of the quantum fields is computed, but, after next-order
backreaction is accounted for, it will become singular. Then, strong cosmic
censorship will be enforced in the BTZ black hole. We support our claims using
a four-dimensional holographic dual of the system, which connects the
instability of the inner horizon of the BTZ black hole to that of Kerr-type
black holes.
