N_H − λ_EDD plane, adapted from Ricci et al. (2022), and including density contours of the BASS XXXVII sample (gray areas). The green region labeled “OUTFLOWS” (also known in the literature as the forbidden region) corresponds to an N_H − λ_EDD space where absorption cannot be long-lived. The dot-dashed line corresponds to the effective Eddington limit for dusty gas reported in Ishibashi et al. (2018), while the dashed line is the effective Eddington limit when including infrared radiation trapping, from the same authors, adapted to the seminal values of Fabian et al. (2009) (solid black line constraining the forbidden region), similarly to what was done by Lansbury et al. (2020). 2M0918 entered and left the outflow region twice between 2001 and 2021, in agreement with the detection of outflows.