Further, there is no analytic rate constant theory that could explain the sharp resonance suppression either (condition 1). Transition state theory (TST) predicts no frequency-dependent VSC effects and existing rate constant theory beyond TST often depends on the barrier frequency , or has a very broad cavityfrequency dependence for the rate changes . These shortcomings of using the existing rate theories to explain VSC effects strongly hint that a proper mechanistic description of the VSC resonance suppression leads to a completely new analytic rate constant expression. On the other hand, related to the collective effect, seemingly promising simulations in Ref. showed that the effect of collective resonance enhancement of rate was due to the relaxation rate constant of the non-equilibrium initial condition of the molecule-cavity hybrid system , whereas the chemical reaction rate constant remains the same as outside the cavity when the dynamics enter into the linear response regime .