Previous works suggest that ion pairing in confined electrolytes can differ substantially from that in bulk solutions. Classical molecular dynamics (MD) simulations of confined aqueous electrolytes by Robin et al., for example, predicted a much greater prevalence of ion pairs under confinement, including the formation of polyelectrolyte-type ionic clusters upon application of an electric field. The authors rationalized these results based on continuum electrostatics, wherein the dielectric mismatch between the electrolyte and channel walls enhances the electric field generated by a confined ion. Other work, however, suggests that continuum-level theory alone may be insufficient for understanding confined ion interactions.