We are most interested in the performance of B(α)LYP for 20 ≤ α ≤ 50, which is the range that extends from something B3LYP-like (α = 20), up to BH&H-LYP (α = 50). Within that range, we observe no serious deterioration in accuracy relative to B3LYP+D3, and even one very small improvement for α = 30. Although the statistical significance of this decrease is unclear, at the very least the MAE for barrier heights does not increase in any meaningful way, up to α = 50. When compared to B3LYP+D3, the α = 50 functional looks very similar except that the average maximum error is somewhat larger, at 7.0 kcal/mol (BH&H-LYP+D3) versus 6.0 kcal/mol (B3LYP+D3). When the percentage of exact exchange is increased beyond 50%, however, the MAEs do begin to increase somewhat while the average maximum errors increase significantly.