These conclusions provide guidelines about when CPCM is useful for fixing convergence issues in large-scale DFT calculations, especially when traditional SCF convergence techniques fail. The ε value can now be selected more transparently: it should fall in the range efficient for improving convergence and appropriate for DDE mitigation. However, CPCM as an SCF convergence technique also has its limitations. For some highly polarizable molecules, such as the ones with conjugated bonds, the converged wave function can be very far from the gas-phase wave function even when a very low ε=2.0 is applied. Further investigations are needed to determine the effect of CPCM on the DFT convergence and electron density of other systems, such as transition metalcontaining molecules. In addition, it is also possible to develop new SCF convergence techniques based on the mechanism of CPCM's convergence acceleration effects.