That said, if we exclude def2-SVP and the Pople basis sets then convergence to the DH-DFT/CBS limit is reasonable and is facilitated by CP correction, especially in double-ζ basis sets such as def2-SVPD. A graphical example is presented in Fig. for Karlsruhe basis sets; see Figs. S1-S3 for additional functionals and basis sets. Using CP correction in conjunction with def2-SVPD results in a mean convergence error of 0.2 kcal/mol, comparable to the CP-corrected def2-TZVPD error. While diffuse functions prove to be important (e.g., the def2-TZVP convergence error is a bit larger at 0.3 kcal/mol, even with CP correction), this analysis demonstrates that correlation-consistent basis sets are not required to reach the DH-DFT/CBS limit, which can lead to significant cost savings. Convergence errors remain larger in Pople basis sets (see Fig. ) and are only somewhat mitigated (in most cases) by CP correction. These basis sets are therefore not recommended for double-hybrid functionals.