  We clarify a number of issues that arise when extending the analysis of
Strong Cosmic Censorship (SCC) to perturbations of highly charged
Reissner-Nordstr\"{o}m de Sitter (RNdS) spacetimes. The linear stability of the
Cauchy horizon can be determined from the spectral gap of quasinormal modes,
thus giving a clear idea of the ranges of parameters that are likely to lead to
SCC violations for infinitesimally small perturbations. However, the situation
becomes much more subtle once nonlinear backreaction is taken into account.
These subtleties have created a considerable amount of confusion in the
literature regarding the conclusions one is able to derive about SCC from the
available numerical simulations. Here we present new numerical results
concerning charged self-gravitating scalar fields in spherical symmetry,
correct some previous claims concerning the neutral case, and argue that the
existing numerical codes are insufficient to draw conclusions about the
potential failure of SCC for near extremal RNdS black hole spacetimes.
