A paradigmatic model for several theoretical studies is that of an isomerization reaction coupled to a single mode cavity. Note that this model combines the complexity of IVR dynamics with that of multidimensional quantum tunnelling. The classical dynamical study of Li, Mandal and Huo emphasized the role of the barrier "frequency" (ω b ) and argued that the suppression of the isomerization rate occurs when the cavity frequency ω c ∼ ω b , due to a dynamical caging effect near the TS. On the other hand, the quantum dynamical work of Fischer, Anders, and Saalfrank showed that the isomerization probability can be reduced by nearly an order of magnitude when ω c ∼ ω R , the harmonic frequency of the reactant well. The latter observation is closer to the scenario proposed in the original VSC experiments by Ebbesen and coworkers . However, the choice of the initial state in the quantum study corresponds to a cavity with virtual photons . Moreover, note that while Li et al investigated the modification of the Grote-Hynes (GH) transmission coefficient due to coupling to the cavity, the study of Fischer et al focused on the time evolution of an initial vibropolaritonic wavepacket localized in the reactant well. A recent study by Lindoy, Mandal, and Reichman invoked the classical Pollak-Grabert-Hänggi (PGH) theory to show that rate suppression for ω c ∼ ω b and rate enhancement for ω c ∼ ω R are possible for strong (spatial diffusion limit) and weak (energy diffusion limit) solvent friction respectively. A follow up work by the same authors emphasized the importance of a fully quantum dynamical approach including cavity loss and system-solvent coupling. Note that sharp resonance effects have been theoretically predicted by Sun and Vendrell in their classical dynamical study of the full dimensional cis-trans HONO isomerization reaction. Interestingly, the above works also indicate that certain features typically observed in the VSC experiments are reproduced even in the single molecule limit. It is interesting to note that the recent study by Fiechter et al suggests that even in this paradigm model several questions remain unanswered.