The consequences of polaron decoupling are demonstrated in Fig. . The reduction of the reorganization energies of the polariton and dark states relative to the ground state changes the reorganization energy of these states relative to the acceptor states, thus directly impacting the Marcus transfer rate. Fig. shows the effect of increasing the number of molecules while maintaining the same Rabi splitting. In this case, the increase in N , and consequential decrease in λ D , cause an increase in the cavity-modified ET rate relative to the rate outside the cavity. However, this increased relative rate eventually plateaus at large N since λ D nears its limit of 0. The effect of the ratio of λ D to λ A in the large N limit is examined in Fig. . Depending on the relative magnitude and sign of the reorganization energies, λ D versus λ A , the many-molecule cavity may experience an increased or decreased rate of electron transfer, with the largest rate increases seen at very large relative λ D values. This demonstrates that light-matter coupling can have a very system-dependent effect on the rate due to polaron decoupling.