Main panel: Fraction of clouds arising from the three origin channels as a function of (z = 0) cloud mass (indicated by thick solid curves). A large fraction (∼40–60%) were previously present in the central galaxy and have been driven out into the CGM in the last ≲2 Gyr (black). The ejection of gas from satellites gives rise to a small portion of the population (∼3–5%; orange). A majority of the remaining clouds are formed through condensation of the hot phase of the CGM in the last ∼2 Gyr. The thin gray curve shows the fraction of clouds that are long-lived, i.e. those whose progenitors already exist at least ∼2 Gyr ago (∼2–10%). Top panel: Assessment of numerical convergence. The fraction of clouds arising through in situ condensation of the hot phase in the RF512 suite (solid curves) is contrasted against the lower resolution RF64 (dashed) and RF8 (dotted) runs. Results between resolution levels approach convergence toward the high mass end, i.e. well above the resolution limit.